"Life then is indestructible as all else is. All destruction and construction are changes in the nature of Love, as I have written to you in the former chapter proximate. Yet even as the blood in one pulse-throb of the wrist is not the same blood as that in the next, so individuality is in part destroyed as each life passeth; nay, even with each thought.
"What then maketh man, if he dieth and is reborn a changeling with each breath? This: the consciousness of continuity given by memory, the conception of his Self as something whose existence, far from being threatened by these changes, is in verity assured by them. Let then the aspirant to the sacred Wisdom consider his Self no more as one segment of the Serpent, but as the whole. Let him extend his consciousness to regard both birth and death as incidents trivial as systole and diastole of the heart itself, and necessary as they to its function."
-- Aleister Crowley, De Lege Libellum