The perceptive act is a reaction of the mind upon the object of which it is the perception.

For psychological purposes the most important differences in conation are those in virtue of which the object is revealed as sensed or perceived or imaged or remembered or thought.

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

What is the meaning of the togetherness of the perceiving mind, in that peculiar modification of perceiving which makes it perceive not a star but a tree, and the tree itself, is a problem for philosophy

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.

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

Both expectations and memories are more than mere images founded on previous experience.