For, as our idea of infinity being, as I think, but the idea of any quantity the mind has, being at that time in that idea, (for be it as great as it will, it can be no greater than it is,) to join infinity to it, is to adjust a standing measure to a growing bulk; and therefore I think it is not an insignificant subtilty, if I say, that we are carefully to distinguish between the idea of the infinity of space, and the idea of a space infinite.