Worry not about the possible troubles of the future; for if they come, you are but anticipating and adding to their weight; and if they do not come, your worry is useless; and in either case it is weak and in vain, and a distrust of Gods providence. – Hugh Blair
One could write a history of science in reverse by assembling the solemn pronouncements of highest authority about what could not be done and could never happen. – Robert A. Heinlein
