True knowledge lies in knowing how to live.
It is impossible to live without brains either ones own or borrowed.
A bad manner spoils everything, even reason and justice; a good one supplies everything, gilds a No, sweetens a truth, and adds a touch of beauty to old age itself.
Advice is sometimes transmitted more successfully through a joke than grave teaching.
He that communicates his secret to another makes himself that other's slave.
True friendship multiplies the good in life and divides its evils. Strive to have friends, for life without friends is like life on a desert island... to find one real friend in a lifetime is good fortune; to keep him is a blessing.