For me, the idea of a creation is not conceivable without invoking the necessity of design. One cannot be exposed to the law and order of the universe without concluding that there must be design and purpose behind it all.

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

I believe that the time has arrived for medical investigation of the problems of manned rocket flight, for it will not be the engineering problems but rather the limits of the human frame that will make the final decision as to whether manned space flight will eventually become a reality.

It takes sixty-five thousand errors before you are qualified to make a rocket.

We can lick gravity, but sometimes the paperwork is overwhelming.

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

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