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

Science and religion are not antagonists. On the contrary, they are sisters. While science tries to learn more about the creation, religion tries to better understand the Creator. While through science man tries to harness the forces of nature around him, through religion he tries to harness the force of nature within him.

I'm convinced that before the year 2000 is over, the first child will have been born on the moon.

In 1492 Columbus knew less about the far Atlantic than we do about the heavens, yet he chose not to sail with a flotilla of less than three ships. . . . So it is with interplanetary exploration: it must be done on the grand scale.

If we continue at this leisurly pace, we will have to pass Russian customs when we land on the moon.

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.

Looking back, nothing seems so simple than a utopian vision realised.