Free will in antiquity
In Plato's Gorgias (and in the Protagoras 345c4-e6), Socrates argues that no one does wrong willingly, one of the most famous doctrines to be associated with him. When framed in modern (Western) terms, the implication is that it is ignorance, rather that free individual agency, that is responsible for morally wrong actions.
Eternal oblivion
In the "Apology of Socrates" (written by Plato), after Socrates is sentenced to death, he addresses the court. He ponders the nature of death, and summarizes that there are basically two opinions about it. The first is that it is a migration of the soul or consciousness from this existence into another, and that the souls of all previously deceased people will also be there. This excites Socrates, because he will be able to conduct his dialectic inquiries with all of the great Greek heroes and thinkers of the past. The other opinion about death is that it is oblivion, the complete cessation of consciousness, not only unable to feel but a complete lack of awareness, like a person in a deep, dreamless sleep. Socrates says that even this oblivion does not frighten him very much, because while he would be unaware, he would correspondingly be free from any pain or suffering. Indeed, Socrates says, not even the great King of Persia could say that he ever rested so soundly and peacefully as he did in a dreamless sleep.