Man is the only living being who has a developed self-awareness and death-awareness.

Nothing in biology makes sense except in the light of evolution.

The more we know, the better we realize that our knowledge is a little island in the midst of an ocean of ignorance.

Does the evolutionary doctrine clash with religious faith? It does not. It is a blunder to mistake the Holy Scriptures for elementary textbooks of astronomy, geology, biology, and anthropology.

Natural selection must be replaced by eugenical artificial selection. This idea constitutes the sound core of eugenics, the applied science of human betterment.

The living world is not a single array... connected by unbroken series of intergrades.

No evidence is powerful enough to force acceptance of a conclusion that is emotionally distasteful.

Nature's stern discipline enjoins mutual help at least as often as warfare. The fittest may also be the gentlest.

Scientists often have a naive faith that if only they could discover enough facts about a problem, these facts would somehow arrange themselves in a compelling and true solution.

Pat answers to complex problems are the hallmark of intellectual mediocrity

No known human group... simply throw out its dead without any ritual or ceremony. In stark contrast, no animal practices burial of dead individuals of its own species.

By acting in a positive, pleasant and optimistic way, you become a positive, optimistic and enjoyable person.

Life is a dream even in its most painful moments, it's a dream that we can dance to.

Sickness is mankind's greatest defect.

Nothing can help my comedy.

You can never be too prepared. I don't believe creativity needs to come from chaos, I find it's easier to be creative when I'm really "ready".

Frankly, my fundamental beliefs have not changed.

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Unexpectedly, a fierce sense of protectiveness comes over me. Except I fight it back because I can hardly look after myself these days.

I speak to the paper, as I speak to the first person I meet.

I'm so lucky. I've met a lot of famous people.