Time travel was once considered scientific heresy, and I used to avoid talking about it for fear of being labelled a 'crank.'

In fact, if one considers the possible constants and laws that could have emerged, the odds against a universe that produced life like ours are immense.

Nothing is fool-proof to a sufficiently talented fool.

I'm here to chew gum and kick some ass, and I'm all out of gum.

Think of our DNA. In the last million years, our DNA hasn't changed at all. It's really much the same as it was in the jungle, a million, two millions years ago. But in the last 200 years, our destructive capacities have increased many, many millions of times over. Why don't we see intelligent signals from outer space? Because in all likelihood, once the civilization reaches the point our civilization has reached, it destroys itself.

We live in the most probable of all possible worlds.

A picture is worth a thousand words...and uses up a thousand times the memory.