The strength of any plan depends on the time. Circumstances and things eternally shift and change.
Michel de MontaigneCan anything be imagined so ridiculous that this miserable and wretched creature, who is not so much as master of himself, but subject to the injuries of all things, should call himself master and emperor of the world, of which he has not power to know the least part, much less to command the whole?
Michel de Montaigne