You can mark in desire the rising of the tide, as the appetite more and more invades the personality, appealing, as it does, not merely to the sensory side of the self, but to its ideal components as well.

Curiosity begins as an act of tearing to pieces or analysis.

Mental life is indeed practical through and through. It begins in practice and it ends in practice.

Hence, in desiring, the more the enjoyment is delayed, the more fancy begins to weave about the object images of future fruition, and to clothe the desired object with properties calculated to inflame the impulse.

It is more difficult to designate this form of conation on its practical side by a satisfactory name.

Psychology is the science of the act of experiencing, and deals with the whole system of such acts as they make up mental life.

Such being the nature of mental life, the business of psychology is primarily to describe in detail the various forms which attention or conation assumes upon the different levels of that life.