Note O — BOOK II

Let us remember that immortality signifies a negative, or not having of mortality, and that a positive term is required by which to express a change, since nature teaches that whatever is, will abide with the being it is, unless forced out of it by something positive. And as it appears that man's soul has these grounds in her which make all visible things to be perishable, it is obvious that his soul is immortal and the cause of mortality itself.—Sir Kenelm Digby.