"Evolution of the body depends upon the evolution of the germ of life or the individual soul. When these two are combined the explanation becomes perfect. The theory of Reincarnation is a logical necessity for the completion of the theory of Evolution. If we admit a continuous evolution of a unit of the germ of life through many gross manifestations then we unconsciously accept the teachings of the doctrine of Reincarnation. In passing through different forms and manifestations the unit of life does not lose its identity or individuality. As an atom does not lose its identity or individuality (if you allow me to suppose an atom has a kind of individuality) although it passes from the mineral, through the vegetable, into the animal, so the germ of life always preserves its identity or individuality although it passes through the different stages of evolution."
January 1, 1970
https://en.wikiquote.org/wiki/Science_and_mysticism