I shall not enter any further into that disquisition; it sufficing to my purpose to observe, that gold or saffron has power to produce in us the idea of yellow, and snow or milk the idea of white, which we can only have by our sight without examining the texture of the parts of those bodies or the particular figures or motion of the particles which rebound from them, to cause in us that particular sensation, though, when we go beyond the bare ideas in our minds and would inquire into their causes, we cannot conceive anything else to be in any sensible object, whereby it produces different ideas in us, but the different bulk, figure, number, texture, and motion of its insensible parts. .