There is no disease which can affect the man's divine soul, no sickness which can lay it low. It is his incorruptible element. Hence it is certainly true to say that the perfect man does not suffer from these things. But what is usually ignored or generally unknown is that "the perfect man" does not exist on earth, only "in heaven"; never in the flesh, only in the spirit. This earth and this body have been given over to the alternations of decay and growth, of death and birth--in short, to processes of change involving corruptibility. There is only one sure, permanent, and impeccable way of overcoming disease or sickness, and that is to live consciously in the Overself as well as the body. Whoever understands all this will find it easy to understand that the same causes prevent the possibility of living forever in identically the same body, and thus of attaining physical immortality. The laws which influence the building up of the body are precisely the laws which also influence its eventual breaking down. There is no trustworthy record in history that any human being has so far evaded the operation of these laws and survived the planet's vast evolutionary cycles. That man may discover how to prolong his life beyond the present average span or how to preserve his body in good functional and organic health is, however, a possibility which need not in any way be denied by these statements.
-- Notebooks Category 10: Healing of the Self > Chapter 1 : The Laws of Nature > # 48
