It is part of the cure to wish to be cured.

A single lifetime, even though entirely devoted to the sky, would not be enough for the study of so vast a subject. A time will come when our descendants will be amazed that we did not know things that are so plain to them.

You cannot, I repeat, successfully acquire it and preserve your modesty at the same time.

Death's the discharge of our debt of sorrow.

Be harsh with yourself at times.

When some state or other offered Alexander a part of its territory and half of all its property he told them that 'he hadn't come to Asia with the intention of accepting whatever they cared to give him, but of letting them keep whatever he chose to leave them.' Philosophy, likewise, tells all other occupations: 'It's not my intention to accept whatever time is leftover from you; you shall have, instead, what I reject.' Give your whole mind to her.

Virtue is that perfect good, which is the complement of a happy life; the only immortal thing that belongs to mortality.