I have learned to use the word 'impossible' with the greatest caution.

In this modern world of ours many people seem to think that science has somehow made such religious ideas as immortality untimely or old fashioned. I think science has a real surprise for the skeptics. Science, for instance, tells us that nothing in nature, not even the tiniest particle, can disappear without a trace. Nature does not know extinction. All it knows is transformation. If God applies this fundamental principle to the most minute and insignificant parts of His universe, doesn't it make sense to assume that He applies it to the masterpiece of His creation, the human soul?

Our sun is one of a 100 billion stars in our galaxy. Our galaxy is one of billions of galaxies populating the universe. It would be the height of presumption to think that we are the only living thing in that enormous immensity.

By the year 2000 we will undoubtedly have a sizable operation on the Moon, we will have achieved a manned Mars landing and it's entirely possible we will have flown with men to the outer planets.

There are flying grandfathers. But I intend to be an orbiting grandfather.

The best computer is a man, and it’s the only one that can be mass-produced by unskilled labor.

The rocket worked perfectly, except for landing on the wrong planet.