It says that the dualists are right in finding something behind all, as a background which does not change; we cannot conceive change without there being something unchangeable. We can only conceive of anything that is changeable, by knowing something which is less changeable, and this also must appear more changeable in comparison with something else which is less changeable, and so on and on, until we are bound to admit that there must be something which never changes at all. The whole of this manifestation must have been in a state of non-manifestation, calm and silent, being the balance of opposing forces, so to say, when no force operated, because force acts when a disturbance of the equilibrium comes in. The universe is ever hurrying on to return to that state of equilibrium again. If we are certain of any fact whatsoever, we are certain of this. When the dualists claim that there is a something which does not change, they are perfectly right, but their analysis that it is an underlying something which is neither the body nor the mind, a something separate from both, is wrong.