Any product that needs a manual to work is broken.

The true test of a man's character is what he does when no one is watching.

Character is like a tree and reputation like a shadow. The shadow is what we think of it; the tree is the real thing.

No one can make you feel inferior without your consent.

A scientist in his laboratory is not a mere technician: he is also a child confronting natural phenomena that impress him as though they were fairy tales.?

Parents are usually more careful to bestow knowledge on their children rather than virtue, the art of speaking well rather than doing well; but their manners should be of the greatest concern.

True valor lies between cowardice and rashness.

There is a real magic in enthusiasm. It spells the difference between mediocrity and accomplishment

The idea of freedom is inspiring. But what does it mean? If you are free in a political sense but have no food, what's that? The freedom to starve?

You can have anything in this world you want, if you want it badly enough and you're willing to pay the price.

Dare to risk public criticism.

I've got a woman's ability to stick to a job and get on with it when everyone else walks off and leaves it.

Our greatest foes - and whom we must chiefly combat - are within.

Memory... is an internal rumour.

Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense.

When something is important enough, you do it even if the odds are not in your favor.

I have great faith in fools; self-confidence my friends call it.

A process cannot be understood by stopping it. Understanding must move with the flow of the process, must join it and flow with it.

I don't do drugs, I am drugs

When you do things from your soul, you feel a river moving in you, a joy.

A person preaches well that lives well.