Maybe this world is another planet’s Hell. (Aldous Huxley)

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

Many a man’s reputation would not know his character if they met onthe street. (Elbert Hubbard)

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

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