If you pick up a starving dog and make him prosperous he will not bite you. This is the principal difference between a dog and man.

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.

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.?

When you get to a certain age, there is no coming back.

Like religion, politics, and family planning, cereal is not a topic to be brought up in public. It's too controversial.

Charity ... is the opium of the privileged.

The bat thought I was giving him the kiss of life!

Reputation is what men and women think of us; character is what God and angels know of us.

One of the great penalties those of us who live our lives in full view of the public must pay is the loss of that most cherished birthright of man's, privacy.

With me poetry has not been a purpose, but a passion.

How lucky I am to have something that makes saying goodbye so hard.

It is a process of diverting one's scattered forces into one powerful channel.

No flying machine will ever fly from New York to Paris.

Those who hammer their guns into plows, will plow for those who do not.

At the bottom of enmity between strangers lies indifference.

One of the advantages of being disorderly is that one is constantly making exciting discoveries.

Everything is vague to a degree you do not realize till you have tried to make it precise.

My loneliness was born when men praised my talkative faults and blamed my silent virtues.

Maybe, just once, someone will call me 'Sir' without adding, 'You're making a scene.'

The poor are prevented from thinking by the discipline of others, the rich by their own.

Jests that give pains are not jests.