To a poet nothing can be useless. Samuel Johnson
Oh Lord, let me not live to be useless. John Wesley
We don't go to school to learn, but to be soaked in the prejudices of our class, without which we should be useless and unhappy. André Maurois
Some sort of pressure must exist. The artist exists because the world is not perfect. Art would be useless if the world were perfect, as man wouldn't look for harmony but would simply live in it. Art is born out of an ill-designed world. Andrei Tarkovsky
Passion is universal humanity. Without it religion, history, romance and art would be useless. Honoré de Balzac
If it were not for the hands, the clock would be useless. Polish Proverb