The first duty of a man is the seeking after and the investigation of truth.
Notes from Wikiquote
Compare: "The distinguishing property of man is to search for and to follow after truth." – De Officiis, Book I, 13
I never cease urging peace, which, however unfair, is better than the justest war in the world.
Every one is least known to himself, and it is very difficult for a man to know himself.
Quote text and notes from Wikiquote: Cicero (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.