Yet this is the essential and capital function of Sensation: to supply the material on which the mind does the work in its subsequent thought and action.
Next comes the process by which the mind holds its material for future use, the process of Memory; and with it the process by which it combines its material together in various useful forms, making up things and persons out of the material which has been received and remembered--called Association of Ideas, Thinking, Reasoning, etc.

All these processes used to be considered as separate "faculties" of the soul and as showing the mind doing different things.

But that view is now completely given up.

Psychology now treats the activity of the mind in a much more simple way.

It says: Mind does only one thing; in all these so-called faculties we have the mind doing this one thing only on the different materials which come and go in it.