Willy Ley Quotes
Why should we try for space travel? It cannot be a substance of any kind that can be expected to pay. It can only be something intangible, not involving haulage, which is at the same time more valuable. There is something like that: Knowledge.
Citations
Ley, Willy. Rockets, Missiles, and Space Travel. Viking Press, 1951.
Related Quotes
Willy Otto Oskar Ley was a German-American science writer and proponent of cryptozoology. The crater Ley on the far side of the Moon is named in his honor.