Charles Darwin

A man who dares to waste one hour of time has not discovered the value of life.

Charles Darwin

The highest possible stage in moral culture is when we recognise that we ought to control our thoughts.

Charles Darwin

The willing horse is always overworked.

Charles Darwin

We are optimists, until we are not.

Charles Darwin

A man’s friendships are one of the best measures of his worth.

Charles Darwin

An American monkey, an Ateles, after getting drunk on brandy, would never touch it again, and thus was wiser than many men.

Charles Darwin

Even people who aren’t geniuses can outthink the rest of mankind if they develop certain thinking habits.

Charles Darwin

Even when we are quite alone, how often do we think with pleasure or pain of what others think of us – of their imagined approbation or disapprobation.

Charles Darwin

I love fools’ experiments. I am always making them.

Charles Darwin

Ignorance more frequently begets confidence than does knowledge.

Charles Darwin