Agathon quotes:

Even God cannot change the past.

Every ruler must remember three things. Firstly, that he rules man; secondly, that he rules according to law, and thirdly, that he does not rule for ever.

This only is denied to God: the power to undo the past.

This only is denied even to God: the power to undo the past.

There are some vile and contemptible men who, allowing themselves to be conquered by misfortune, seek a refuge in death.

The improvement of the mind improves the heart and corrects the understanding.

Of this alone, even god is deprived, the power of making things that are past never to have been.

Art is in love with luck, and luck with art.