“Everything is theoretically impossible, until it is done.”
Robert A. Heinlein
“Faith means belief in something concerning which doubt is theoretically possible”
William James
“The theoretical broadening which comes from having many humanities subjects on the campus is offset by the general dopiness of the people who study these things...”
Richard Feynman
“I constructed a theoretically perfect thrust, but I eliminated a few intermediate movements so that nobody could execute it. It has the appearance of being perfect”
Arturo Perez Reverte
“Whenever anyone says, "theoretically", they really mean, "not really"”
Dave Parnas
“There are no walls in life except the ones we create.”
Josh Lowin
“We get our morals from books. I didn't get mine from books, but I know that morals do come from books theoretically, at least.”
Mark Twain