The cowboys have a way of trussing up a steer or a pugnacious bronco which fixes the brute so that it can neither move nor think. This is the hog-tie, and it is what Euclid did to geometry. – Eric Bell, The Search for Truth

Although I am almost illiterate mathematically, I grasped very early in life that any one who can count to ten can count upward indefinitely if he is fool enough to do so. – Robertson Davies, "Of the Conservation of Youth," The Table Talk of Samu

How many times can you subtract 7 from 83, and what is left afterwards? You can subtract it as many times as you want, and it leaves 76 every time. – Author Unknown

The human mind has never invented a labor-saving machine equal to algebra. – Author Unknown