Through-out this forum there are number of ways in which virtue is listed, including "no absolute virtue" which I think can come across as unclear.
I think a more clear way would be to say:
Virtues are entirely instrumental and inseparable from the happy life.
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Also just a note for future "to-do" list...it looks like some re-organization of the ethics sub-forum is needed regarding the various virtues.
(And that also there is a section by Philodemus that is not under ethics but is under texts and persons).