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

Those who know, do. Those that understand, teach.

Although our intellect always longs for clarity and certainty, our nature often finds uncertainty fascinating.

Where there is anger, there is always pain underneath.

Act enthusiastic and you will be enthusiastic

Confidence is contagious. So is lack of confidence.

Don't criticize what you can't understand.

Above all be of single aim; have a legitimate and useful purpose, and devote yourself unreservedly to it.

Yes, I guess you could say I am a loner, but I feel more lonely in a crowed room with boring people than I feel on my own.

Man's sensitivity to the little things and insensitivity to the greatest are the signs of a strange disorder.

You laugh at me because I'm different, I laugh at you because you're all the same.

I have no desire to make windows into mens souls

Be realistic: Plan for a miracle

Judge a man by his questions rather than by his answers.

The smaller the mind, the greater the conceit.

A house is not a home unless it contains food and fire for the mind as well as the body.

It is tact that is golden, not silence.

Forget not that the earth delights to feel your bare feet and the winds long to play with your hair.

There is geometry in the humming of the strings. There is music in the spacing of the spheres.

Convictions are more dangerous enemies of truth than lies.

You are braver than you believe, stronger than you seem, and smarter than you think.