We call that psychical process, which is operative in the clear perception of a narrow region of the content of consciousness, attention. - Wilhelm Wundt

The whole task of psychology can therefore be summed up in these two problems : (1) What are the elements of consciousness ? (2) What combinations do these elements undergo and what laws govern these combinations ?

The results of ethnic psychology constitute... our chief source of information regarding the general psychology of the complex mental processes.

In Aristotle the mind, regarded as the principle of life, divides into nutrition, sensation, and faculty of thought, corresponding to the inner most important stages in the succession of vital phenomena.