The universe is not required to be in perfect harmony with human ambition. Carl Sagan
Money is not required to buy one necessity of the soul. Henry David Thoreau
To understand this for sense it is not required that a man should be a geometrician or a logician, but that he should be mad. Thomas Hobbes
Beneficent spirals, operating by benign feedback, mean that everything needful is not required at once: each individual improvement is beneficial for the whole. Jane Jacobs
Love is always being given where it is not required. E. M. Forster
Both sexes allow men dentists inside our mouths, but, well, have you ever let a man who is a dental hygienist inside your mouth? The man must earn his way to our private places in a way not required of a woman--he must become the doctor or the dentist, or forget it. Warren Farrell