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

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

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

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

Desire then is the invasion of the whole self by the wish, which, as it invades, sets going more and more of the psychical processes; but at the same time, so long as it remains desire, does not succeed in getting possession of the self.

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.

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