the clichés of our editors. But the analogy is there nevertheless. No
control over heat and light and electricity, today our slaves, was
possible until physics and chemistry took them in hand. No control of
the human soul is possible until it too will be taken in hand by them.
We may now look forward to a real future for mankind because we have
before us the beginnings of a chemistry of human nature. The internal
secretions, with their influence upon brain and nervous system as
well as every other part of the body corporation, as essentially
blood-circulating chemical substances, have been discovered the real
governors and arbiters of instincts and dispositions, emotions and
reactions, characters and temperaments, good and bad. A huge complex
of evidence, as various, complicated and obscure as human nature
itself, supports that fundamental law.

The chemistry of the soul! Magnificent phrase! It's a long, long way
to that goal. The exact formula is as yet far beyond our reach. But we
have started upon the long journey and we shall get there. Then will
Man truly become the experimental animal of the future, experimenting
not only with the external conditions of his life, but with the
constituents of his very nature and soul. The chemical conditions of
his being, including the internal secretions, are the steps of the
ladder by which he will climb to those dizzy heights where he will
stretch out his hands and find himself a God. Modern knowledge of
these chemical substances, circulating in the blood, and affecting
every cell of the body, dates back scarce half a century. But already
the paths blazed by the pioneers have led to the exploration of great
countries. The thyroid gland, the pituitary gland, the adrenal glands,
the thymus, the pineal, the sex glands, have yielded secrets. And
certain great postulates have been established. The life of every
individual, normal or abnormal, his physical appearance, and his