Virtue is shut out from no one; she is open to all, accepts all, invites all, gentlemen, freedmen, slaves, kings, and exiles; she selects neither house nor fortune; she is satisfied with a human being without adjuncts.

You talk one way, you live another.

How much longer are you going to be a pupil? From now on do some teaching as well.

The important thing about a problem is not its solution, but the strength we gain in finding the solution

Let us cherish and love old age; for it is full of pleasure, if you know how to use it. The best morsel is reserved for last.

It is the power of the mind to be unconquerable.

Freedom is not being a slave to any circumstance, to any constraint, to any chance; it means compelling Fortune to enter the lists on equal terms.