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

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

The sensory acts are accordingly distinguished by their objects.

The interval between a cold expectation and a warm desire may be filled by expectations of varying degrees of warmth or by desires of varying degrees of coldness.

You can mark in desire the rising of the tide, as the appetite more and more invades the personality, appealing, as it does, not merely to the sensory side of the self, but to its ideal components as well.

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

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