You've got to be very careful if you don't know where you're going, because you might not get there.
Obstacles are those frightful things you see when you take your eyes off your goals.
Be interesting, be enthusiastic... and don't talk too much.
I do know that when I am 60, I should be attempting to achieve different personal goals than those which had priority at age 20.
You must take personal responsibility. You cannot change the circumstances, the seasons, or the wind, but you can change yourself. That is something you have charge of.
Well done is better than well said.
I am easily satisfied with the very best.
It is hard to fail, but it is worse never to have tried to succeed.
Real success can only come if there is a change in our societies and in our economics and in our politics.
Old Professors never die, they just lose their faculties.
Without a humble but reasonable confidence in your own powers you cannot be successful or happy.
The best way to destroy an enemy is to make him a friend.
Personally, I enjoy working about 18 hours a day. Besides the short catnaps I take each day, I average about four to five hours of sleep per night.
With any part you play, there is a certain amount of yourself in it. There has to be, otherwise it's just not acting. It's lying.
One of the main weaknesses of mankind is the average man's familiarity with the word 'impossible'.
Be quick, but don't hurry.
Find out what you really love to do, and then find a way to make a good living doing it.
To know what people really think, pay regard to what they do, rather than what they say.
I never did a day's work in my life. It was all fun.
There is nothing more difficult to carry out, nor more doubtful of success, nor more dangerous to handle, that to institute a new order of things
Your most unhappy customers are your greatest source of learning.