Two Aspects of Life Principle
Lebens-Erhaltungskraft = that power which sustains organism in harmonious, vital operation; makes and maintains symptoms in a diseased effort to preserve life (back-action, after-action, counter-action). (Aphorism 63, footnote 205a)
Lebens-Erzeugenskraft = that power of the life force that generates life (conception) and is also involved in engendering disease; it is also that power that must be involved in curing disease. (Aphorism 64)