The day science begins to study non-physical phenomena, it will make more progress in one decade than in all the previous centuries of its existence.

To solve any problem, here are three questions to ask yourself: First, what could I do? Second, what could I read? And third, who could I ask?

Success is never final. Failure is never fatal. It s courage that counts.

You don't have to be great to start, but you have to start to be great

Do one thing at a time, and while doing it put your whole soul into it to the exclusion of all else.

Speak softly and carry a big stick; you will go far.

Innovation distinguishes between a leader and a follower.

Many are stubborn in pursuit of the path they have chosen, few in pursuit of the goal.

Whosoever desires constant success must change his conduct with the times.

One can have no smaller or greater mastery than mastery of oneself.

Of all the things I've done, the most vital is coordinating those who work with me and aiming their efforts at a certain goal

Whenever you are asked if you can do a job, tell 'em, 'Certainly I can!' Then get busy and find out how to do it.

Dictionary is the only place that success comes before work. Hard work is the price we must pay for success. I think you can accomplish anything if you're willing to pay the price.

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

To be clever enough to get all that money, one must be stupid enough to want it.

Why, look at me. I've worked my way up from nothing to a state of extreme poverty.

Success is going from failure to failure without loss of enthusiasm.

From each according to his abilities, to each according to his needs.

I do not like to repeat successes, I like to go on to other things.

If you're trying to create a company, it's like baking a cake. You have to have all the ingredients in the right proportion.

Either you run the day or the day runs you.