Were you to live three thousand years, or even thirty thousand, remember that the sole life which a man can lose is that which he is living at the moment; and furthermore, that he can have no other life except the one he loses.

From Apollonius I learned freedom of will and undeviating steadiness of purpose; and to look to nothing else, not even for a moment, except to reason.

Even while a thing is in the act of coming into existence, some part of it has already ceased to be.

A man is a little soul carrying around a courpse.

Enter others' minds and let them enter yours.

The only wealth which you will keep forever is the wealth you have given away.

Things can never touch the soul, but stand inert outside it, so that disquiet can arise only from fancies within.