V. Connections Between Organic Processes and the Mental Life of Man

You see how definitely, from life to life, the transmutation of forces may be followed up. When this is done reincarnation will no longer be an abstract truth alone, but will be studied concretely, as one can study physical things. And spiritual science becomes valuable only when in this way we penetrate into concrete facts. If we speak only in generalities of repeated earth lives, and so forth, then these are mere words. They have meaning only if we can enter upon the single concrete facts.