An axe forgets, but the tree remembers.

The greatest day in your life and mine is when we take total responsibility for our attitudes. That’s the day we truly grow up.

Don’t spend all the happiness in your pocket.

It is the weight, not numbers of experiments that is to be regarded.

It is curious that physical courage should be so common in the world and moral courage so rare.

Faith is to believe what you do not see; the reward of this faith is to see what you believe.