Plato argued that when you see something that strikes you as beautiful, you are really just seeing a partial reflection of true beauty, just as a painting or even a photograph only captures part of the real thing. True beauty, or what Plato calls the Form of Beauty, has no particular color, shape, or size. Rather, it is an abstract idea, like the number five. You can make drawings of the number five in blue or red ink, big or small, but the number five itself is none of those things. It has no physical form. Think of the idea of a triangle, for example. Although it has no particular color or size, it somehow lies within each and every triangle you see. Plato thought the same was true of beauty. The Form of Beauty somehow lies within each and every beautiful thing you see.