(1) The aspects of the mind are knowing, feeling and willing.
The mind is a living unit and never knows without feeling in some way and willing to some extent.
(2) What the mind is must be answered by philosophy; what the mind does by psychology and what the mind knows by logic.
Psychology treats of the mind as a whole, logic of the mind knowing, aesthetics of the mind feeling and ethics of the mind willing. Ethics answers the question, What is right? Aesthetics, What is beautiful? Logic, What is true?
The standpoint of logic is not identical with any particular portion of psychology.
The mind knows in two ways: (a) by intuition, (b) by thinking. Thinking is a process—thought a product. Logic deals indirectly with the former and directly with the latter.
Generally speaking, logic is a systematic study of thought. For the logician thought has two sources: (a) his own mind and (b) spoken or written language.
Because of the ambiguity of language logic has much to do with it as a faulty vehicle of thought.
(3) Logic as a science makes known the laws and forms of thought and as an art suggests conditions which must be fulfilled to think rightly. Author.
“Logic may be defined as the science of the conditions on which correct thoughts depend, and the art of attaining to correct and avoiding incorrect thoughts.” Fowler.