I’ve had a wonderful time, but this wasn’t it. (Groucho Marx)

Each problem that I solved became a rule which served afterwards to solve other problems. (Rene Descartes, Discours de la Methode)

Some cause happiness wherever they go; others, whenever they go. (Oscar Wilde)

But at my back I always hear Time’s winged chariot hurrying near. (Andrew Marvell)