There is no question climate change is happening. The only arguable point is what part humans are playing in it.

Great dreams of great dreamers are always transcended.

I don't know, I don't care, and it doesn't make any difference.

Simplicity is the ultimate sophistication.

There is a wisdom of the head, and... there is a wisdom of the heart.

I think, therefore I am.

A scholar who cherishes the love of comfort is not fit to be deemed a scholar.

It is not enough to have a good mind; the main thing is to use it well.

But the fact that some geniuses were laughed at does not imply that all who are laughed at are geniuses. They laughed at Columbus, they laughed at Fulton, they laughed at the Wright brothers. But they also laughed at Bozo the Clown.

The pendulum of the mind oscillates between sense and nonsense, not between right and wrong.

You don't want to lose your old friend - the misery - You have invested too much into false - Hence the fear to be exposed -to be true - to be naked as you are.

No man has any natural authority over his fellow men.

It has seemed to be more necessary to have regard to the weight of words rather than to their number.

Never ruin an apology with an excuse.

There's no sense in being precise when you don't even know what you're talking about.

And this sensitivity will create new friendships for you - friendships with trees, with birds, with animals, with mountains, with rivers, with oceans, with stars. Life becomes richer as love grows.

Beer: The cause of, and solution to, all of life's problems.

Nothing is more intolerable than to have to admit to yourself your own errors.

The heart has its reasons which reason knows not.

Nothing fixes a thing so intensely in the memory as the wish to forget it.

Good means not merely not to do wrong, but rather not to desire to do wrong.