For instance, that every space in which nothing at all is happening that has an impact on my senses is a vacuum; or that in a body that is hot, say, there is something altogether similar to the idea of heat in me; that in a white or green body, there is the same whiteness or greenness of which I have the sensation, in one that is bitter or sweet the same taste, and so on and so forth; that stars and towers and whatever other distant bodies one can think of are only of the same size and shape as they appear to be to my senses, and so on.