To invent, you need a good imagination and a pile of junk.

You've got to be very careful if you don't know where you're going, because you might not get there.

I have not failed. I've just found 10,000 ways that won't work.

You cannot change your destination overnight, but you can change your direction overnight

For it is commonly said: accomplished labours are pleasant.

The greatest leader is not necessarily the one who does the greatest things. He is the one that gets the people to do the greatest things.

The painter has the Universe in his mind and hands.

One must be sane to think clearly, but one can think deeply and be quite insane.

If I have ever made any valuable discoveries, it has been due more to patient attention, than to any other talent.

Real success can only come if there is a change in our societies and in our economics and in our politics.

The secret of success in life is for a man to be ready for his opportunity when it comes.

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.

I never pick up an item without thinking of how I might improve it.

One of the main weaknesses of mankind is the average man's familiarity with the word 'impossible'.

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

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

The major reason for setting a goal is for what it makes of you to accomplish it. What it makes of you will always be the far greater value than what you get.

What I cannot create, I do not understand.

God sells us all things at the price of labor.

Good things happen to those who hustle.

If you think of yourselves as helpless and ineffectual, it is certain that you will create a despotic government to be your master. The wise despot, therefore, maintains among his subjects a popular sense that they are helpless and ineffectual.