Hermann Oberth

The rockets... can be built so powerfully that they could be capable of carrying a man aloft.

If there is a small rocket on top of a big one, and if the big one is jettisoned and the small one is ignited, then their speeds are added.

Our educational system is like an automobile which has strong rear lights, brightly illuminating the past. But looking forward things are barely discernible.

I was good at being a doctor; my patients liked me. At times people trust you with things they wouldn't tell their spouses. It was a real privilege.

It is hardly surprising that women concentrate on the way they look instead of what is in their minds since not much has been put in their minds to begin with.

Well, I actually wrote her a letter a couple of days ago congratulating her. The tone I tried to convey in the letter is, look, you are a part of a great American historical process.