What is the meaning of the togetherness of the perceiving mind, in that peculiar modification of perceiving which makes it perceive not a star but a tree, and the tree itself, is a problem for philosophy

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

Such being the nature of mental life, the business of psychology is primarily to describe in detail the various forms which attention or conation assumes upon the different levels of that life.

When we come to images or memories or thoughts, speculation, while always closely related to practice, is more explicit, and it is in fact not immediately obvious that such processes can be described in any sense as practical.

It is more difficult to designate this form of conation on its practical side by a satisfactory name.

Mental life is indeed practical through and through. It begins in practice and it ends in practice.

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