Most human beings have an almost infinite capacity for taking things for granted. Aldous Huxley
To mistrust science and deny the validity of the scientific method is to resign your job as a human. You'd better go look for work as a plant or wild animal. P. J. O'Rourke
The first human who hurled an insult instead of a stone was the founder of civilization. Sigmund Freud
To err is human, but to really foul things up requires a computer. Paul Ehrlich
The universe is not required to be in perfect harmony with human ambition. Carl Sagan