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

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

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

An expectation is a future object, recognised as belonging to me.

Thus the same object may supply a practical perception to one person and a speculative one to another, or the same person may perceive it partly practically and partly speculatively.

The thing of which the act of perception is the perception is experienced as something not mental.

An object is not first imagined or thought about and then expected or willed, but in being actively expected it is imagined as future and in being willed it is thought.