1. Home
    1. Start Here: Study Guide
    2. Community Standards And Posting Policies
    3. Terms of Use
    4. Moderator Team
    5. Site Map
    6. Quizzes
    7. Articles
      1. Featured Articles
    8. All Blog Posts
      1. Elli's Blog / Articles
  2. Wiki
    1. Wiki Home
    2. FAQ
    3. Classical Epicureanism
    4. Physics Wiki
    5. Canonics Wiki
    6. Ethics Wiki
    7. Search Assistance
    8. Not NeoEpicurean
    9. Foundations
    10. Navigation Outlines
    11. Key Pages
  3. Forum
    1. Full Forum List
    2. Welcome Threads
    3. Physics
    4. Canonics
    5. Ethics
    6. Uncategorized Forum
    7. Study Resources Forum
    8. Ancient Texts Forum
    9. Shortcuts
    10. Featured
    11. Most Discussed
  4. Latest
    1. New Activity
    2. Latest Threads
    3. Dashboard
    4. Search By Tag
    5. Complete Tag List
  5. Podcast
    1. Lucretius Today Podcast
    2. Episode Guide
    3. Lucretius Today At Youtube
    4. EpicureanFriends Youtube Page
  6. Texts
    1. Overview
    2. Diogenes Laertius
    3. Principal Doctrines
    4. Vatican Sayings
    5. Lucretius
    6. Herodotus
    7. Pythocles
    8. Menoeceus
    9. Fragments - Usener Collection
    10. Torquatus On Ethics
    11. Velleius On Gods
    12. Greek/Latin Help
  7. Gallery
    1. Featured images
    2. Albums
    3. Latest Images
    4. Latest Comments
  8. Calendar
    1. Upcoming Events List
    2. Zoom Meetings
    3. This Month
    4. Sunday Zoom Meetings
    5. First Monday Zoom Meetings
    6. Wednesday Zoom Meeting
    7. Twentieth Zoom Meetings
    8. Zoom Meetings
  9. Other
    1. Featured Content
    2. Blog Posts
    3. Files
    4. Logbook
    5. EF ToDo List
    6. Link-Database
  • Login
  • Register
  • Search
This Thread
  • Everywhere
  • This Thread
  • This Forum
  • Forum
  • Articles
  • Blog Articles
  • Files
  • Gallery
  • Events
  • Pages
  • Wiki
  • Help
  • FAQ
  • More Options

Welcome To EpicureanFriends.com!

"Remember that you are mortal, and you have a limited time to live, and in devoting yourself to discussion of the nature of time and eternity you have seen things that have been, are now, and are to come."

Sign In Now
or
Register a new account
  1. Home
    1. Start Here: Study Guide
    2. Community Standards And Posting Policies
    3. Terms of Use
    4. Moderator Team
    5. Site Map
    6. Quizzes
    7. Articles
      1. Featured Articles
    8. All Blog Posts
      1. Elli's Blog / Articles
  2. Wiki
    1. Wiki Home
    2. FAQ
    3. Classical Epicureanism
    4. Physics Wiki
    5. Canonics Wiki
    6. Ethics Wiki
    7. Search Assistance
    8. Not NeoEpicurean
    9. Foundations
    10. Navigation Outlines
    11. Key Pages
  3. Forum
    1. Full Forum List
    2. Welcome Threads
    3. Physics
    4. Canonics
    5. Ethics
    6. Uncategorized Forum
    7. Study Resources Forum
    8. Ancient Texts Forum
    9. Shortcuts
    10. Featured
    11. Most Discussed
  4. Latest
    1. New Activity
    2. Latest Threads
    3. Dashboard
    4. Search By Tag
    5. Complete Tag List
  5. Podcast
    1. Lucretius Today Podcast
    2. Episode Guide
    3. Lucretius Today At Youtube
    4. EpicureanFriends Youtube Page
  6. Texts
    1. Overview
    2. Diogenes Laertius
    3. Principal Doctrines
    4. Vatican Sayings
    5. Lucretius
    6. Herodotus
    7. Pythocles
    8. Menoeceus
    9. Fragments - Usener Collection
    10. Torquatus On Ethics
    11. Velleius On Gods
    12. Greek/Latin Help
  7. Gallery
    1. Featured images
    2. Albums
    3. Latest Images
    4. Latest Comments
  8. Calendar
    1. Upcoming Events List
    2. Zoom Meetings
    3. This Month
    4. Sunday Zoom Meetings
    5. First Monday Zoom Meetings
    6. Wednesday Zoom Meeting
    7. Twentieth Zoom Meetings
    8. Zoom Meetings
  9. Other
    1. Featured Content
    2. Blog Posts
    3. Files
    4. Logbook
    5. EF ToDo List
    6. Link-Database
  1. Home
    1. Start Here: Study Guide
    2. Community Standards And Posting Policies
    3. Terms of Use
    4. Moderator Team
    5. Site Map
    6. Quizzes
    7. Articles
      1. Featured Articles
    8. All Blog Posts
      1. Elli's Blog / Articles
  2. Wiki
    1. Wiki Home
    2. FAQ
    3. Classical Epicureanism
    4. Physics Wiki
    5. Canonics Wiki
    6. Ethics Wiki
    7. Search Assistance
    8. Not NeoEpicurean
    9. Foundations
    10. Navigation Outlines
    11. Key Pages
  3. Forum
    1. Full Forum List
    2. Welcome Threads
    3. Physics
    4. Canonics
    5. Ethics
    6. Uncategorized Forum
    7. Study Resources Forum
    8. Ancient Texts Forum
    9. Shortcuts
    10. Featured
    11. Most Discussed
  4. Latest
    1. New Activity
    2. Latest Threads
    3. Dashboard
    4. Search By Tag
    5. Complete Tag List
  5. Podcast
    1. Lucretius Today Podcast
    2. Episode Guide
    3. Lucretius Today At Youtube
    4. EpicureanFriends Youtube Page
  6. Texts
    1. Overview
    2. Diogenes Laertius
    3. Principal Doctrines
    4. Vatican Sayings
    5. Lucretius
    6. Herodotus
    7. Pythocles
    8. Menoeceus
    9. Fragments - Usener Collection
    10. Torquatus On Ethics
    11. Velleius On Gods
    12. Greek/Latin Help
  7. Gallery
    1. Featured images
    2. Albums
    3. Latest Images
    4. Latest Comments
  8. Calendar
    1. Upcoming Events List
    2. Zoom Meetings
    3. This Month
    4. Sunday Zoom Meetings
    5. First Monday Zoom Meetings
    6. Wednesday Zoom Meeting
    7. Twentieth Zoom Meetings
    8. Zoom Meetings
  9. Other
    1. Featured Content
    2. Blog Posts
    3. Files
    4. Logbook
    5. EF ToDo List
    6. Link-Database
  1. EpicureanFriends - Home of Classical Epicurean Philosophy
  2. Forum
  3. Canonics - The Tests of Truth
  4. He Who Says Nothing Can Be Known Knows Nothing - Rejection of Skepticism
  • Sidebar
  • Sidebar

Key Citations - Knowledge Is Possible

  • Cassius
  • October 4, 2023 at 7:53 PM

We are now requiring that new registrants confirm their request for an account by email.  Once you complete the "Sign Up" process to set up your user name and password, please send an email to the New Accounts Administator to obtain new account approval.

Regularly Checking In On A Small Screen Device? Bookmark THIS page!
  • Online
    Cassius
    05 - Administrator
    Points
    104,804
    Posts
    14,346
    Quizzes
    9
    Quiz rate
    100.0 %
    • October 4, 2023 at 7:53 PM
    • #1

    Lucretius Book Four:

    [469] Again, if any one thinks that nothing is known, he knows not whether that can be known either, since he admits that he knows nothing. Against him then I will refrain from joining issue, who plants himself with his head in the place of his feet. And yet were I to grant that he knows this too, yet I would ask this one question; since he has never before seen any truth in things, whence does he know what is knowing, and not knowing each in turn, what thing has begotten the concept of the true and the false, what thing has proved that the doubtful differs from the certain?

    [478] You will find that the concept of the true is begotten first from the senses, and that the senses cannot be gainsaid. For something must be found with a greater surety, which can of its own authority refute the false by the true. Next then, what must be held to be of greater surety than sense? Will reason, sprung from false sensation, avail to speak against the senses, when it is wholly sprung from the senses? For unless they are true, all reason too becomes false. Or will the ears be able to pass judgement on the eyes, or touch on the ears? or again will the taste in the mouth refute this touch; will the nostrils disprove it, or the eyes show it false? It is not so, I trow. For each sense has its faculty set apart, each its own power, and so it must needs be that we perceive in one way what is soft or cold or hot, and in another the diverse colours of things, and see all that goes along with colour. Likewise, the taste of the mouth has its power apart; in one way smells arise, in another sounds. And so it must needs be that one sense cannot prove another false. Nor again will they be able to pass judgement on themselves, since equal trust must at all times be placed in them. Therefore, whatever they have perceived on each occasion, is true.

    [500] And if reason is unable to unravel the cause, why those things which close at hand were square, are seen round from a distance, still it is better through lack of reasoning to be at fault in accounting for the causes of either shape, rather than to let things clear seen slip abroad from your grasp, and to assail the grounds of belief, and to pluck up the whole foundations on which life and existence rest. For not only would all reasoning fall away; life itself too would collapse straightway, unless you chose to trust the senses, and avoid headlong spots and all other things of this kind which must be shunned, and to make for what is opposite to these. Know, then, that all this is but an empty store of words, which has been drawn up and arrayed against the senses.

    [513] Again, just as in a building, if the first ruler is awry, and if the square is wrong and out of the straight lines, if the level sags a whit in any place, it must needs be that the whole structure will be made faulty and crooked, all awry, bulging, leaning forwards or backwards, and out of harmony, so that some parts seem already to long to fall, or do fall, all betrayed by the first wrong measurements; even so then your reasoning of things must be awry and false, which all springs from false senses.

Unread Threads

    1. Title
    2. Replies
    3. Last Reply
    1. Immutability of Epicurean school in ancient times 11

      • Thanks 1
      • TauPhi
      • July 28, 2025 at 8:44 PM
      • Uncategorized Discussion (General)
      • TauPhi
      • July 29, 2025 at 2:14 PM
    2. Replies
      11
      Views
      701
      11
    3. Eikadistes

      July 29, 2025 at 2:14 PM
    1. Recorded Statements of Metrodorus 11

      • Like 1
      • Cassius
      • July 28, 2025 at 7:44 AM
      • Hermarchus
      • Cassius
      • July 28, 2025 at 7:23 PM
    2. Replies
      11
      Views
      590
      11
    3. Cassius

      July 28, 2025 at 7:23 PM
    1. Philodemus' "On Anger" - General - Texts and Resources 20

      • Like 1
      • Cassius
      • April 1, 2022 at 5:36 PM
      • Philodemus On Anger
      • Cassius
      • July 8, 2025 at 7:33 AM
    2. Replies
      20
      Views
      7.7k
      20
    3. Kalosyni

      July 8, 2025 at 7:33 AM

Finding Things At EpicureanFriends.com

What's the best strategy for finding things on EpicureanFriends.com? Here's a suggested search strategy:

  • First, familiarize yourself with the list of forums. The best way to find threads related to a particular topic is to look in the relevant forum. Over the years most people have tried to start threads according to forum topic, and we regularly move threads from our "general discussion" area over to forums with more descriptive titles.
  • Use the "Search" facility at the top right of every page. Note that the search box asks you what section of the forum you'd like to search. If you don't know, select "Everywhere." Also check the "Search Assistance" page.
  • Use the "Tag" facility, starting with the "Key Tags By Topic" in the right hand navigation pane, or using the "Search By Tag" page, or the "Tag Overview" page which contains a list of all tags alphabetically. We curate the available tags to keep them to a manageable number that is descriptive of frequently-searched topics.

Frequently Used Forums

  • Frequently Asked / Introductory Questions
  • News And Announcements
  • Lucretius Today Podcast
  • Physics (The Nature of the Universe)
  • Canonics (The Tests Of Truth)
  • Ethics (How To Live)
  • Against Determinism
  • Against Skepticism
  • The "Meaning of Life" Question
  • Uncategorized Discussion
  • Comparisons With Other Philosophies
  • Historical Figures
  • Ancient Texts
  • Decline of The Ancient Epicurean Age
  • Unsolved Questions of Epicurean History
  • Welcome New Participants
  • Events - Activism - Outreach
  • Full Forum List

Latest Posts

  • Epicurean Isonomy In The Context Of Statements By Balbus As To Gradations In Life In Book 2 of "On the Nature of the Gods"

    Cassius August 8, 2025 at 5:47 AM
  • Welcome Hubblefanboy!

    Cassius August 7, 2025 at 6:08 PM
  • Episode 294 - TD24 - Responding Further To Cicero's attack on Absence of Pain as Pleasure - Not Yet Recorded

    Cassius August 7, 2025 at 4:00 PM
  • Episode 293 - TD23 - Cicero Accuses Epicurus Of Evasion In Calling "Absence of Pain" A "Pleasure"

    Don August 7, 2025 at 2:38 PM
  • Welcome ZarathustrasGarden!

    Rolf August 7, 2025 at 2:51 AM
  • Artisan Skill (Likely Similar to the Ancient Greek/Roman World)

    kochiekoch August 6, 2025 at 5:54 PM
  • Busts of Epicurus

    kochiekoch August 6, 2025 at 5:03 PM
  • Latest Lucretius Today Podcast - Episode 293 - Cicero Accuses Epicurus Of Evasion In Calling "Absence of Pain" a Pleasure

    Cassius August 6, 2025 at 3:39 PM
  • Reproduction of Venus by Canova

    Kalosyni August 6, 2025 at 3:22 PM
  • The Closing Paragraph of the Letter to Menoeceus

    Don August 6, 2025 at 2:39 PM

Key Tags By Topic

  • #Canonics
  • #Death
  • #Emotions
  • #Engagement
  • #EpicureanLiving
  • #Ethics
  • #FreeWill
  • #Friendship
  • #Gods
  • #Happiness
  • #HighestGood
  • #Images
  • #Infinity
  • #Justice
  • #Knowledge
  • #Physics
  • #Pleasure
  • #Soul
  • #Twentieth
  • #Virtue


Click Here To Search All Tags

To Suggest Additions To This List Click Here

EpicureanFriends - Classical Epicurean Philosophy

  1. Home
    1. About Us
    2. Classical Epicurean Philosophy
  2. Wiki
    1. Getting Started
  3. Frequently Asked Questions
    1. Site Map
  4. Forum
    1. Latest Threads
    2. Featured Threads
    3. Unread Posts
  5. Texts
    1. Core Texts
    2. Biography of Epicurus
    3. Lucretius
  6. Articles
    1. Latest Articles
  7. Gallery
    1. Featured Images
  8. Calendar
    1. This Month At EpicureanFriends
Powered by WoltLab Suite™ 6.0.22
Style: Inspire by cls-design
Stylename
Inspire
Manufacturer
cls-design
Licence
Commercial styles
Help
Supportforum
Visit cls-design