The same forces of nature which enable us to fly to the stars, enable us also to destroy our star.

The first men who set out for Mars had better make sure they leave everything at home in apple-pie order. They won't get back to earth for more than two and a half years. The difficulties of a trip to mars are formidable. . . . What curious information will these first explorers carry back from Mars? Nobody knows-and its extremely doubtful that anyone now living will ever know. All that can be said with certainty today is this: the trip will be made, and will be made . . . someday.

Nature does not know extinction; all it knows is transformation. ... Everything science has taught me-and continues to teach me-strengthens my belief in the continuity of our spiritual existence after death. Nothing disappears without a trace.

To simply dismiss the concept of God as being unscientific is to violate the very objectivity of science itself.

The same forces of nature which enable us to fly to the stars, enable us also to destroy our star.

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

I only hope that we shall not wait to adopt the program until after our astronomers have reported a new and unsuspected asteroid moving across their fields of vision with menacing speed. At that point it will be too late!