You can only acquire it successfully if you cease to feel any sense of shame.

There is no genius without a mixture of madness.

The great thing is to know when to speak and when to keep quiet.

People pay the doctor for his trouble; for his kindness they still remain in his debt.

If you don't know, ask. You will be a fool for the moment, but a wise man for the rest of your life.

The wise man lacked nothing but needed a great number of things, whereas the fool, on the other hand, needs nothing (for he does not know how to use anything) but lacks everything.

No man is nobler born than another, unless he is born with better abilities and a more amiable disposition. They who make such a parade with their family pictures and pedigrees, are, properly speaking, rather to be called noted or notorious than noble persons. I thought it right to say this much, in order to repel the insolence of men who depend entirely upon chance and accidental circumstances for distinction, and not at all on public services and personal merit.