Fundamental to most religions is the doctrine of life after death. Certainly, if it can be shown that there is life after death then this would help count towards any argument for the existence of God. The dualist approach is that there exist both a body and a mind that are distinct from each other, but also in some way interlinked. The body is the 'material' and, as such, is tied to the limitations that the world of matter is subject to, such as ageing and decay and, of course, eventually death. The mind, however, is not part of the temporal, changeable world, so is usually considered eternal and spaceless. Socrates explains that the true philosopher should look forward to death and that they should therefore ready themselves for dying. Plato's views on life after death are closely connected with his theory of the Forms.