§ 83. Attention, depending as it does on the self-determination of the observer, can therefore be improved, and the pupil made attentive, by the educator. Education must accustom him to an exact, rapid, and many-sided attention, so that at the first contact with an object he may grasp it sufficiently and truly, and that it shall not be necessary for him always to be adding to his acquisitions concerning it. The twilight and partialness of intelligence which forces us always to new corrections because a pupil at the very commencement did not give entire attention, must not be tolerated. [Sidenote: _Psychological Faculties._] § 84. We learn from Psychology that mind does not consist of distinct faculties, but that what we choose to call so are only different activities of the same power. Each one is just as essential as the other, on which account Education must grant to each faculty its claim to the same fostering care. If we would construe correctly the axiom _a potiori fit denominatio_ to mean that man is distinguished from animals by thought, and that mediated will is not the same as thought, we must not forget that feeling and representing are not less necessary to a truly complete human being. The special direction which the activity of apprehending intelligence takes are (1) Perception, (2) Conception, (3) Thinking. Dialectically, they pass over into each other; not that Perception rises into Conception, and Conception into Thinking, but that Thinking goes back into Conception, and this again into Perception. In the development of the young, the Perceptive faculty is most active in the infant, the Conceptive in the child, and the Thinking in the youth; and thus we may distinguish an intuitive, an imaginative, and a logical epoch.