We have seen that the Mind is that something within us which Thinks, Feels and Wills. There are various phases of these three forms of activity. These phases have often been called "the faculties of the mind," although many authorities decry the use of this term, holding that it gives an impression of _several parts or divisions_ of the mind, separate and distinct from each other, whereas these phases are merely the several _powers or forms of activity_ of the Mind. Every manifestation of mental activity falls under one of the three before-mentioned general forms, i.e., Thinking, Feeling and Willing, respectively. Every manifestation of mental activity is either that of the Intellect, the Feelings, or the Will. Let us consider the first of these three general forms of mental activity--the Intellect. The _Intellect_ is defined as: "That faculty or phase of the human mind by which it receives or comprehends the ideas communicated to it by the senses or by perception, or other means, as distinguished from the power to feel and to will; the power or faculty to perceive objects in their relations; the power to judge and comprehend; also the capacity for higher forms of knowledge as distinguished from the power to perceive and imagine." The term itself is derived from the Latin term _intellectus_, the primary meaning of which is "to choose between," which primary meaning will give the true essential meaning of the term in its present usage; namely, the faculty or phase of the mind by which we "choose between" things or by which we _decide_. The phase or faculty of Intellect concerns itself with Thinking, in the particular and narrower sense of that term. Its products are _thoughts_, _mental images_ and _ideas_. An _idea_ or _mental image_ is a mental conception of anything, as for instance our conception which we express by the terms, _man_, _animal_, _house_, _etc._ Sometimes the word _idea_ is used to express merely the abstract or generalized conception of the thing, as, for instance, _Man_ in the sense of "all men;" while _mental image_ is used in the sense of the mental conception of some one particular thing, as a "_a man_;" it being held that no mental image can be had of a generalization. A _thought_ is held to be a mental product arising from a combination of two or more ideas or mental images, as for instance: "A horse is an animal;" "a man is a biped;" etc. The Intellect is held to embrace and include a number of minor phases or faculties, such as Perception, Understanding, Imagination, Memory, Reason and Intuition, which are explained as follows: