“We have found a strange footprint on the shores of the unknown. We have devised profound theories, one after another, to account for its origins. At last, we have succeeded in reconstructing the creature that made the footprint. And lo! It is our own.”

Ciekawe cytaty:

• I never guess. …
“I never guess. It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts.”
• Something unknown is …
“Something unknown is doing we don’t know what.”
• Man is tormented …
“Man is tormented by no greater anxiety than to find someone quickly to whom he can hand over that great gift of freedom with which the ill-fated creature is born.”
• I have not …
“I have not failed. I’ve just found 10,000 ways that won’t work.”
• In preparing for …
“In preparing for battle I have always found that plans are useless, but planning is indispensable.”