All men, or most men, wish what is noble but choose what is profitable; and while it is noble to render a service not with an eye to receiving one in return, it is profitable to receive one. One ought therefore, if one can, to return the equivalent of services received, and to do so willingly; for one ought not to make a man one's friend if one is unwilling to return his favors.

The true nature of anything is what it becomes at its highest.

Health is a matter of choice, not a mystery of chance

Be a free thinker and don't accept everything you hear as truth. Be critical and evaluate what you believe in.

Knowing what is right does not make a sagacious man.

The continuum is that which is divisible into indivisibles that are infinitely divisible.

The goal of war is peace, of business, leisure