Fear doesn't exist anywhere except in the mind.

Just remember, once you're over the hill you begin to pick up speed.

Learned we may be with another man's learning: we can only be wise with wisdom of our own.

Each problem that I solved became a rule which served afterwards to solve other problems.

Science has not yet taught us if madness is or is not the sublimity of the intelligence.

Boredom is the root of all evil - the despairing refusal to be oneself.

Appearances often are deceiving.

Creativity is the process of having original ideas that have value.

I dream. Sometimes I think that's the only right thing to do.

Yes, I guess you could say I am a loner, but I feel more lonely in a crowed room with boring people than I feel on my own.

What can't be cured must be endured.

Between stimulus and response there is a space. In that space is our power to choose our response. In our response lies our growth and our freedom.

A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.

It is divinity that shapes, not only your ends, but also your acts, your words and thoughts.

Do not say a little in many words, but a great deal in few!

Respect yourself if you would have others respect you.

I hear and I forget. I see and I remember. I do and I understand.

Accuracy is the twin brother of honesty; inaccuracy, of dishonesty.

What lies behind us and what lies ahead of us are tiny matters compared to what lives within us.

You can best serve civilization by being against what usually passes for it.

Tis very certain the desire of life prolongs it.