Anyone who has never made a mistake has never tried anything new.

The only source of knowledge is experience.

We cannot solve our problems with the same thinking we used when we created them.

Logic will get you from A to B. Imagination will take you everywhere.

You have to learn the rules of the game. And then you have to play better than anyone else.

Insanity is doing the same thing, over and over again, but expecting different results.

It’s not that I am so smart, it’s just that I stay with problems longer.

Weakness of attitude becomes weakness of character.

In the middle of difficulty lies opportunity.

Any man who reads too much and uses his own brain too little falls into lazy habits of thinking.

Any man who can drive safely while kissing a pretty girl is

An empty stomach is not a good political adviser.

As far as I’m concerned, I prefer silent vice to ostentatious virtue.

Before God we are all equally wise – and equally foolish.

Common sense is the collection of prejudices acquired by age eighteen.

Coincidence is God’s way of remaining anonymous.

Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.

Education is what remains after one has forgotten what one has learned in school.

Force always attracts men of low morality.