All one can really leave one's children is what's inside their heads. Education, in other words, and not earthly possessions, is the ultimate legacy, the only thing that cannot be taken away.

Science does not have a moral dimension. It is like a knife. If you give it to a surgeon or a murderer, each will use it differently.

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

What we will have attained when Neil Armstrong steps down upon the moon is a completely new step in the evolution of man.

Man is not made for space. But with the help of biologists and medical doctors, he can be prepared and accommodated.

In order for us to use the very best judgment possible in spending the taxpayer's money intelligently, we just have to do a certain amount of this research and development work ourselves. We just have to keep our own hands dirty to command the professional respect of the contractor personnel engaged with actual design, shop and testing work.

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.