“If you want to earn the gratitude of your own age you must keep in step with it. But if you do that you will produce nothing great. If you have something great in view you must address yourself to posterity: only then, to be sure, you will probably remain unknown to your contemporaries; you will be like a man compelled to spend his life on a desert island and there toiling to erect a memorial so that future seafarers shall know he once existed.”