How can you thank a man for giving you what's already yours? How then can you thank him for giving you only part of what is yours?

Of mankind we may say in general they are fickle, hypocritical, and greedy of gain.

We are just an advanced breed of monkeys on a minor planet of a very average star. But we can understand the Universe. That makes us something very special.

Though I love my country, I do not love my countrymen.

Stupid men are often capable of things the clever would not dare to contemplate...

Great men are like eagles, and build their nest on some lofty solitude.

It was to carry the American democratic journey beyond these failings that Black citizens and civil rights workers risked unemployment, violence and death.

The capacity to suffer varies more than anything that I have observed in human nature.

I like university professors, but you know, we shouldn't hold them up as the high-water mark of all human achievement. They're just a form of life, another form of life.

That man is the noblest creature may also be inferred from the fact that no other creature has yet contested this claim.

Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works.

Challenging the meaning of life is the truest expression of the state of being human.

A man is not rightly conditioned until he is a happy, healthy, and prosperous being; and happiness, health, and prosperity are the result of a harmonious adjustment of the inner with the outer of the man with his surroundings.

Humanity is acquiring all the right technology for all the wrong reasons.

All sins are attempts to fill voids.

There is no marvel in a woman learning to speak, but there would be in teaching her to hold her tongue.

He who makes a beast of himself gets rid of the pain of being a man.

Outstanding people have one thing in common: an absolute sense of mission

To understand how any society functions you must understand the relationship between the men and the women.

I despise people who depend on these things [heroin and cocaine]. If you really want a mind-altering experience, look at a tree.

We are not enemies, but friends. We must not be enemies. Though passion may have strained, it must not break our bonds of affection. The mystic chords of memory will swell when again touched, as surely they will be, by the better angels of our nature.