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also true. It is pure dogmatism to insist that causation is limited to any one realm. Therefore if we are to formulate a really profound theory we must start with the activities which are fundamental to all.

It is well known, for example, that many diseases are due to nervous shock. Whether or not a person suffers a violent nervous reaction in such a case depends upon the degree of composure. The degree of pain suffered depends upon the presence or absence of nervous tension. Fear is doubtless a factor in many cases, but fear gains the mastery only when there is lack of self-control. Pain may be enormously increased or greatly diminished by muscular rigidity, in the one case, and restful relaxation in the other. A sudden outburst of pain which would carry everything before it in some instances, by arousing the most terrible fears, would pass almost unnoticed in another instance when the meaning of the sensation was understood. Dyspepsia, catarrh, diseases of the lungs, rheumatism, paralysis, and a hundred other maladies are, relatively speaking, effects, externals, when compared with the mode of using the psycho- physiological forces whose disturbed equilibrium was the basis of these gradually developed conditions. For disease springs out of the whole life and must be studied from the point of view of the whole. There may be a dozen