We are one of only three species on our planet that can claim to be self-aware, yet self-delusion may be a more significant characteristic of our kind.

Raising children is, in a sense, the reason the society exists in the first place. It's the most important thing that happens, and it's the culmination of all the tools and language and social structure that has evolved.

Theories are just fantasies. And they change.

For our own species, evolution occurs mostly through our behavior. We innovate new behavior to adapt.

Even if you don't believe in God, you still have to believe in something that gives meaning to your life, and shapes your sense of the world. Such a belief is religious.

They didn't understand what they were doing. I'm afraid that will be on the tombstone of the human race.

It's better to die laughing than to live each moment in fear.