To err is human.

Instead of dirt and poison we have rather chosen to fill our hives with honey and wax; thus furnishing mankind with the two noblest of things, which are sweetness and light.

There is no such thing as absolute certainty, but there is assurance sufficient for the purposes of human life.

There are two ways to get enough: One is to continue to accumulate more and more. The other is to desire less.

Nobody is more inferior than those who insists on being equal.

Sometimes a cigar is just a cigar.

Solitude is for me a fount of healing which makes my life worth living.

Rest not! Life is sweeping by; go and dare before you die. Something mighty and sublime, leave behind to conquer time.

The hardest thing to learn in life is which bridge to cross and which to burn.

All I have seen teaches me to trust the Creator for all I have now seen.

Some of us think holding on makes us strong, but sometimes it is letting go.

In a word, each man is questioned by life; and he can only answer to life by answering for his own life; to life he can only respond by being responsible.

Knowledge rests not upon truth alone, but upon error also.

There is nothing so absurd or ridiculous that has not at some time been said by some philosopher.

A life spent making mistakes is not only more honorable, but more useful than a life spent doing nothing.

The successful man will profit from his mistakes and try again in a different way.

Sometimes when you innovate, you make mistakes. It is best to admit them quickly, and get on with improving your other innovations.

All men make mistakes, but a good man yields when he knows he knows his course is wrong and repairs the evil. The only crime is pride.

Constant effort and frequent mistakes are the stepping stones to genius.