God has endued the soul with two faculties: one is that by which it is capable of perception and speculation, or by which it discerns, and views, and judges of things; which is called the understanding. The other faculty is that by which the soul does not merely perceive and view things, but is some way inclined with respect to the things it views or considers; either is inclined to them, or is disinclined and averse from them; or is the faculty by which the soul does not behold things, as an indifferent unaffected spectator, but either as liking or disliking, pleased or displeased, it is sometimes called inclination: and, as it has respect to the actions that are determined and governed by it, is called the will: and the mind, with regard to the exercises of this faculty, is often called the heart.

(Jonathan Edwards, “Religious Affections”; C. H. Faust and T. H. Johnson, Jonathan Edwards, 1935, pp. 209.)