Extraordinary claims require extraordinary evidence.

It ain't over 'til it's over.

I like to think of myself at home in the armchair, writing, smoking and occasionally wandering down the shop.

I recommend that the Statue of Liberty be supplemented by a Statue of Responsibility on the west coast.

Genius is one percent inspiration and ninety-nine percent perspiration.

Don't tell me the moon is shining; show me the glint of light on broken glass.

Delay always breeds danger. To protract a great design is often to ruin it.

Self-esteem comes from being able to define the world in your own terms and refusing to abide by the judgments of others.

I got rabies shots for biting the head off a bat but that`s OK - the bat had to get Ozzy shots.

Before I speak, I have something important to say.

To be rooted is perhaps the most important and least recognized need of the human soul.

I am not interested in picking up crumbs of compassion thrown from the table of someone who considers himself my master. I want the full menu of rights.

The universe we observe has precisely the properties we should expect if there is, at bottom, no design, no purpose, no evil and no good, nothing but blind pitiless indifference.

The mind is a superb instrument if used rightly. Used wrongly, however, it becomes very destructive. To put it more accurately... you usually don't use it at all. It uses you.

If a dog will not come to you after having looked you in the face, you should go home and examine your conscience.

Your personal nature seeks its paradise.

Radical simply means 'grasping things at the root'.

A hero cannot be a hero unless in a heroic world.

I apologize for lying to you. I promise I won't deceive you except in matters of this sort.

Common sense is not so common.

Children's talent to endure stems from their ignorance of alternatives.