Hyl. It is a material substance with the sensible qualities inhering in it.
Phil. How then can a great heat exist in it, since you own it cannot in a material substance? I desire you would clear this point.
Hyl. Hold, Philonous, I fear I was out in yielding intense heat to be a pain. It should seem rather, that pain is something distinct from heat, and the consequence or effect of it.
Phil. Upon putting your hand near the fire, do you perceive one simple uniform sensation, or two distinct sensations?
Hyl. But one simple sensation.
Phil. Is not the heat immediately perceived?
Hyl. It is.
Phil. And the pain?
Hyl. True.
Phil. Seeing therefore they are both immediately perceived at the same time, and the fire affects you only with one simple or uncompounded idea, it follows that this same simple idea is both the intense heat immediately perceived, and the pain; and, consequently, that the intense heat immediately perceived is nothing distinct from a particular sort of pain.