But given that all men generally have ideas of things present to the mind as soon as they want them, and that this occurs many times daily, practically everyone concludes that the will attending the production, or rather, the presence of ideas is their true cause, because at the time they see nothing they can assign as their cause, and because they believe that ideas cease to exist as soon as the mind ceases to perceive them and begin to exist again when they are represented to the mind.