ABSTRACT
The energy expended in adjusting life is directed toward (1) replenishing the store of energy, (2) insuring the growth and (3) safety of the organism, and, finally, (4) in providing for the reproduction and perpetuation of the species. This expenditure of energy implies movement, a current, or, as it is often called, élan vital. In man, as long as the current flows smoothly and the object for which the expenditure takes place is being realized, a sense of comfort and satisfaction is the result. If, on the other hand, the flow is impeded, very often a feeling of discomfort and an ungratified wish mark the disturbance of the biological balance and introduce elements of conflict into life. In the effort to restore the lost equilibrium the body must follow some course of action. In the lower animals this inclination gives rise to impulses, tendencies, attitudes as it does in man, but in the latter the intended course of action has still other phases variously described as wish, desire, purpose, etc.
