Bernard M. Baruch
Approach each new problem not with a view of finding what you hope will be there, but to get the truth, the realities that must be grappled with. You may not like what you find. In that case you are entitled to try to change it. But do not deceive yourself as to what you do find to be the facts of the situation.
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.
Age is only a number, a cipher for the records. A man can't retire his experience. He must use it. Experience achieves more with less energy and time.
Every man has a right to his opinion, but no man has a right to be wrong in his facts.
Never answer a critic, unless he's right.
If you have made a mistake, cut your losses as quickly as possible.
To me, old age is always 15 years older than I am.