We rend of a joy unspeakable and full of glory, of a peace that passeth all understanding, with innumerable other expressions of a similar kind, which indicate strong and vehement emotions of mind. That the great objects of Christianity, called eternity, heaven, and hell, are of sufficient magnitude to justify vivid emotions of joy, fear, and love, is indisputable, if it be allowed we have any relation to them; nor is it less certain that religion could never have any powerful influence if it did not influence through the medium of the affections. All objects which have any permanent influence influence the conduct in this way. We may possibly be first set in motion by their supposed connection with our interest; but unless they draw to themselves particular affections the pursuit soon terminates.
Affections (as joy, grief, fear, and anger, with such like), being, as it were, the sundry fashions and forms of appetite, can neither rise at the conceit of a thing indifferent, nor yet choose but rise at the sight of some things.