Leviathan

For men measure, not onely other men, but all other things, by themselves:

For in a way beset with those that contend on one side for too great Liberty, and on the other side for too much Authority, 'tis hard to passe between the points of both unwounded.

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Much memory, or memory of many things, is called Experience.

This Decaying Sense, when wee would express the thing it self, (I mean Fancy it selfe,) wee call Imagination, as I said before; But when we would express the Decay, and signifie that the Sense is fading, old, and past, it is called Memory.

Imagination therefore is nothing but Decaying Sense;

as wee see in the water, though the wind cease, the waves give not over rowling for a long time after; so also it happeneth in that motion, which is made in the internall parts of a man, then, when he Sees, Dreams, &c.

That when a thing lies still, unlesse somewhat els stirre it, it will lye still for ever, is a truth that no man doubts of. But that when a thing is in motion, it will eternally be in motion, unless somewhat els stay it, though the reason be the same, (namely, that nothing can change it selfe,) is not so easily assented to.

So that Sense in all cases, is nothing els but originall fancy

And though at some certain distance, the reall, and very object seem invested with the fancy it begets in us; Yet still the object is one thing, the image or fancy is another.