"In the study of this system of evolution, we have learnt that there are in every man three great divisions—body, soul and spirit; and each of these is capable of further subdivision. That is the definition which was given by St. Paul two thousand years ago. The Spirit or Monad is the breath of God (for the word spirit means breath, from the Latin spiro), the divine spark which is truly the Man, though it may more accurately be described as hovering over man as we know him. The scheme of its evolution is that it should descend into matter, and through its descent obtain definiteness and accuracy in material detail."
January 1, 1970
https://en.wikiquote.org/wiki/Science_and_mysticism