Differences
We often say that things differ in degree but not in kind, as though there were a fixed line at which degree ends and kind begins. There is no such line. All differences resolve themselves into differences of degree. Everything can in the end be united with everything by easy stages if a way long enough and round-about enough be taken. Hence to the metaphysician everything will become one, being united with everything else by degrees so subtle that there is no escape from seeing the universe as a single whole. This in theory; but in practice it would get us into such a mess that we had better go on talking about differences of kind as well as of degree.