It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change.

I think the highest and lowest points are the important ones. Anything else is just...in between.

Science is the outcome of being prepared to live without certainty and therefore a mark of maturity. It embraces doubt and loose ends.

The gentleman understands rightousness, the petty man understands interest.

My life didn't please me, so I created my life.

In the end, everything is a gag.

Landlords, like all other men, love to reap where they never sowed.

You can find the entire cosmos lurking in its least remarkable objects.

Insanity in individuals is rare - but in groups, parties, nations, and epochs, it is the rule.

Yesterday is dead, tomorrow hasn't arrived yet. I have just one day, and I'm going to be happy in it.

A tragedy means always a man's struggle with that which is stronger than man.

Early in life I had to choose between honest arrogance and hypocritical humility. I chose the former and have seen no reason to change.

Too much of a good thing can be wonderful!

Life does not need to mutilate itself in order to be pure.

In the survival of favoured individuals and races, during the constantly-recurring struggle for existence, we see a powerful and ever-acting form of selection.

I would rather entertain and hope that people learned something than educate people and hope they were entertained.

No social problem is as universal as the oppression of the child

Never throughout history has a man who lived a life of ease left a name worth remembering.

Joy is what happens to us when we allow ourselves to recognize how good things really are.

Your children are not your children. They are the sons and daughters of Life's longing for itself.

Do what's right for you, as long as it don't hurt no one