The fuel cell is just a fundamentally inferior way of delivering electrical energy to an electric motor than batteries.

Humans need to be a multiplanet species.

The key test for an acronym is to ask whether it helps or hurts communication.

I do love email. Wherever possible I try to communicate asynchronously. I'm really good at email.

The extension of life beyond Earth is the most important thing we can do as a species.

You should be innovating so fast that you're invalidating your prior patents.

We need to be super careful with AI. Potentially more dangerous than nukes.

I don't create companies for the sake of creating companies, but to get things done.

There's a tremendous bias against taking risks. Everyone is trying to optimize their ass-covering.

It's OK to have your eggs in one basket as long as you control what happens to that basket.

It is better to offer no excuse than a bad one.

If freedom of speech is taken away, then dumb and silent we may be led, like sheep to the slaughter.

It is better to be alone than in bad company.

My mother was the most beautiful woman I ever saw. All I am I owe to my mother. I attribute my success in life to the moral, intellectual and physical education I received from her.

Be courteous to all, but intimate with few, and let those few be well tried before you give them your confidence. True friendship is a plant of slow growth, and must undergo and withstand the shocks of adversity before it is entitled to appellation.

Human happiness and moral duty are inseparably connected.

99% of failures come from people who make excuses.

Guard against the impostures of pretended patriotism.

Labor to keep alive in your breast that little spark of celestial fire called conscience.