The mental act of sensation which issues in reflex movement is so simple as to defy analysis.

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

It may be added, to prevent misunderstanding, that when I speak of contemplated objects in this last phrase as objects of contemplation, the act of contemplation itself is of course an enjoyment.

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.

But unfortunately Locke treated ideas of reflection as if they were another class of objects of contemplation beside ideas of sensation.

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