In moments of great grief, that’s where you look and immerse yourself. You realise you are not immortal, you are not a god, you are part of the natural world and you come to accept that.

Early to bed and early to rise, Makes a man healthy, wealthy, and wise.

Do not pray for an easy life, pray for the strength to endure a difficult one.

A wise man can learn more from a foolish question than a fool can learn from a wise answer.

He that cannot reason is a fool. He that will not is a bigot. He that dare not is a slave.

Those who can not change their minds can not change anything.

Science has not yet taught us if madness is or is not the sublimity of the intelligence.

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

It takes a great man to be a good listener.

Wisdom is not the product of schooling, but of the lifelong attempt to acquire it.

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

The only real mistake is the one from which we learn nothing.

Experience keeps a dear school, but fools will learn in no other.

An understanding of the natural world is a source of not only great curiosity, but great fulfilment.

The path to success is to take massive, determined action.

I've learned that people will forget what you said, people will forget what you did, but people will never forget how you made them feel.

If you would take, you must first give, this is the beginning of intelligence.

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

I am a lover of truth, a worshipper of freedom, a celebrant at the altar of language and purity and tolerance.

Just remember, once you're over the hill you begin to pick up speed.

Colorless green ideas sleep furiously