No one can deny the excitement of visiting another world.

The factor most ignored in discussing interstellar flight is the kinetic energy that must be invested in the ship to make its tons of matter move at a substantial fraction of the speed of light.

Antimatter is not a source of energy for us, it's a method of storing energy, compact but inefficient.

Years of science fiction have produced a mindset that it is human destiny to expand from Earth, to the Moon, to Mars, to the stars.

Above all, I would not expect a wise race, at great expense, to set loose an army of self-replicating robots.

It would be a pity if, frustrated by the price of travel, we elected to become a society that never made contact, that never gave SETI a fair chance.

Present annual world energy consumption is about equal to the annihilation energy of 4 tons of matter.

In the past, on Earth, it has largely been to exploit foreign resources and to expand the domestic territory.

The purpose of business is to create and keep a customer.

The deeper your thoughts, the clearer your dreams. The clearer your dreams, the higher you fly. Decide to fly!

That sad sinking feeling you get when you don't fit in even with other autistics

I would like to tell the young men and women before me not to lose hope and courage. Success can only come to you by courageous devotion to the task lying in front of you.

In reading, the mind is, in fact, only the playground of another's thoughts.

I just try to be myself and not conform to something I'm not and just continue doing what I do. I just try not to think about the fact that I'm an inspiration for people.

Most of the awesome people I know are just normal people who were insanely driven.

The journey is the destination. The process you're in is the goal. Success is never defined by the outcome but by the process.

The best way to improve economic prospects for women is to improve job prospects for the men in their lives, even if that means increasing the so-called pay gap.

Just as science is more immediate and exciting than the history of science, so is insight more compelling than a history of insight.