Robert Oppenheimer

"An optimist thinks that this is the best possible world. A pessimist fears that this is true."

- Robert Oppenheimer

"An optimist believes this is the best possible universe. The opposite of optimists is pessimists who fear this to be true."

- Robert Oppenheimer

"There is something irreversible about acquiring knowledge; and the simulation of the search for it differs in a most profound way from the reality."

- Robert Oppenheimer