The beginning of wisdom is a definition of terms.

A multitude of books distracts the mind.

What most counts is not merely to live, but to live right.

Such as thy words are, such will thy affections be esteemed; and such will thy deeds be as thy affections and such thy life as thy deeds.

Wisdom is knowing how little we know.

The warm love has the coldest end.

You too must be of good hope as regards death, gentlemen of the jury, and keep this one truth in mind, that a good man cannot be harmed either in life or in death, and that his affairs are not neglected by the gods. What has happened to me now has not happened of itself, but it is clear to me that it was better for me to die now and to escape from trouble. That is why my divine sign did not oppose me at any point. So I am certainly not angry with those who convicted me, or with my accusers. Of course that was not their purpose when they accused and convicted me, but they thought they were hurting me, and for this they deserve blame.