  As this passage illustrates, Locke himself acknowledges that the notion that the mind is a kind of repository or storehouse is metaphorical. According to Locke’s own theory, ideas and impressions cannot be stored. Locke is committed to the thesis that ideas are momentary and non-continuous and to the thesis that identity over time requires continuous existence. These two theses jointly entail that numerically identical ideas cannot be stored over time. Nevertheless, Reid criticizes Locke for being unable to extricate himself from metaphor when Locke claims that in memory, “the mind, as it were, paints ideas anew on it self.” On what model does the mind paint the idea anew? In order to use a previous idea as its model, the mind must remember it. But then the ability to paint ideas anew upon itself presupposes rather than explains memory.