The sensory acts are accordingly distinguished by their objects.

In the perception of a tree we can distinguish the act of experiencing, or perceiving, from the thing experienced, or perceived.

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

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

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.

We cannot therefore say that mental acts contain a cognitive as well as a conative element.

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