The ability to kill someone doesn't make you a leader, and it doesn't make someone great. There's nothing great about dying or taking a life.

Fear is no crime. But acting from fear is. Know that you're going to lose everything one day, whether you fear to lose it or not.

Humanity's savageness is what makes it civilized. Technology, trade, computers, space travel. All are products of competition and conflict.

Every time there was conquest, it brought trade, new ideas, and inventions. They made civilization evolve to new heights. Humans soar on the wings of our violent nature. There's no other way.

Blind risk is stupid, but calculated risks are worth taking.

Beyond all sciences, philosophies, theologies, and histories, a child's relentless inquiry is truly all it takes to remind us that we don't know as much as we think we know.

The loneliness of another can be shocking when it lays itself bare without warning.

If a man takes one day off, it takes him about three days to get the harness fitted again.

If there were no nobodies, The somebodies would not have anybody, To convince that they were somebody, Except some other somebody, Who would not be convinced anyway.

I was a big fan of Indiana Jones; then I realized he was kind of a fake hero. The real heroes are the people who work hard and do their stuff right, like firefighters and policemen.

I'm the product of 6 million years of evolution? Come on, man. I crawled out of a swamp yesterday.

People who believe they are acting with the mandate of God, who see others who don't share their beliefs as inferior in the eyes of God, make dangerous leaders. Just ask Osama Bin Laden.

A person may be greedy, envious, cowardly, cold, ungenerous, unkind, vain, or conceited, but behave perfectly by a monumental act of the will.

Everyone lets the present moment slip by, then looks for it as though he thought it were somewhere else.