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

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.

No one can deny the excitement of visiting another world.

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.

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.

Whoever is willing to sacrifice his life for God will always be under His protection

The higher the artist, the fewer the gestures. The fewer the tools, the greater the imagination. The greater the will, the greater the secret failure.

You do have demons throughout the week; every coach does.

Thou large-brain'd woman and large-hearted man.

I swing between procrastination and being really thorough so either way things aren't getting done quickly.

Barbarisation may be defined as a cultural process whereby an attained condition of high value is gradually overrun and supersededby elements of lower quality.

Change from the top down happens at the will and whim of those below.

I was taught from a young age that as a teacher, especially a male, you are to never be alone with a female, or even a male student.

Classless society is the dream of people with no class.