Disturbances and conflicts in the emotional sexual field may, we know, in these and similar ways become transformed into physical symptoms of disorder which can be seen to have a precise symbolic relationship to definite events in the patient's emotional history, while fits of nervous terror, or anxiety-neurosis, may frequently be regarded as a degradation of thwarted or disturbed sexual energy, manifesting its origin by presenting a picture of sexual excitation transposed into a non-sexual shape of an entirely useless or mischievous character.
Thus, to sum up, we may say that the sexual energy of the organism is a mighty force, automatically generated throughout life.

Under healthy conditions that force is transmuted in more or less degree, but never entirely, into forms that further the development of the individual and the general ends of life.

These transformations are to some extent automatic, to some extent within the control of personal guidance.

But there are limits to such guidance, for the primitive human personality can never be altogether rendered an artificial creature of civilisation.

When these limits are reached the transmutation of sexual energy may become useless or even dangerous, and we fail to attain the exquisite flower of Purity.
III It may seem that in setting forth the nature of the sexual impulse in the light of modern biology and psychology, I have said but little of purity and less of morality.