"Only as you do know yourself can your brain serve you as a sharp and efficient tool. Know your own failings, passions, and prejudices so you can separate them from what you see."

"If you have made a mistake, cut your losses as quickly as possible."

"Old age is always fifteen years older than I am."

"Never answer a critic, unless he's right."

"Of all the self-fulfilling prophecies in our culture, the assumption that aging means decline and poor health is probably the deadliest."

"The longer I live the more beautiful life becomes."

"It is a mistake to regard age as a downhill grade toward dissolution. The reverse is true. As one grows older, one climbs with surprising strides."

"The older I get, the more I feel almost beautiful..."

"The surprising thing about young fools is how many survive to become old fools."

"Always be nice to those younger than you, because they are the ones who will be writing about you."