Arithmetic is numbers you squeeze from your head to your hand to your pencil to your paper till you get the answer. – Carl Sandburg, "Arithmetic"

Sometimes it is useful to know how large your zero is. – Author Unknown

Anyone who cannot cope with mathematics is not fully human. At best he is a tolerable subhuman who has learned to wear shoes, bathe, and not make messes in the house. – Robert Heinlein, Time Enough for Love