The energies of the whole organism were set in action through stimuli arising from the outside world by way of the sense of smell.

In process of time the mechanism has become immensely elaborated, yet its healthy activity is ultimately dependent on a rich and varied action and reaction with the external world.

It is becoming recognised that the tendency to pluri-glandular insufficiency, with its resulting lack of organic harmony and equilibrium, can be counteracted by the physical and psychic stimuli of intimate contacts with the external world.

In this action and reaction, moreover, we cannot distinguish between sexual ends and general ends.

The activities of the ductless glands and their hormones equally serve both ends in ways that cannot be distinguished.