Next week we will incorporate this statement from Diogenes Laertius 32 as to the relationship between the feelings of pleasure and pain and Epicurus' view of what is true and real:
EpicureanFriends Side-By-Side Diogenes Laertius Ten
32
Moreover, they are out of the reach of any control; for one sensation cannot judge of another which resembles itself; for they have all an equal value. Nor can one judge of another which is different from itself; since their objects are not identical. In a word, one sensation cannot control another, since the effects of all of them influence us equally. Again, the reason cannot pronounce on the senses; for we have already said that all reasoning has the senses for its foundation. Reality and the evidence of sensation establish the certainty of the senses; for the impressions of sight and hearing are just as real, just as evident, as pain.