For by grace are ye saved through faith; and that not of yourselves: it is the gift of God… – Ephesians 2:8
Faith operates upon the entire nature and becomes the instrument in the hand of the regenerating Spirit by which all the faculties of the soul are put into the right condition. As a man thinketh in his heart so is he, but his thinkings come out of his believings; if he be put right in his believing, then his understanding will operate upon his affections, and all the other powers of his manhood, and old things will pass away, all things will become new through the wonderful effect of the faith, which is of the operation of God. Faith works by love, and through love it purifies the soul, and the man becomes a new creature. See ye then the wisdom of God? He may choose what way He will, but He chooses a way which at once guards His grace from our felonious boastings, and on the other hand produces in us a holiness which otherwise never would have been there.
Faith saves us just as the mouth saves from hunger. If we be hungry, bread is the real cure for hunger, but still it would be right to say that eating removes hunger, seeing that the bread itself could not benefit us, unless the mouth should eat it. Faith is the soul’s mouth, whereby the hunger of the heart is removed. Christ also is the brazen serpent lifted up; all the healing virtue is in Him; yet no healing virtue comes out of the brazen serpent to any who will not look; so that the looking is rightly considered to be the act which saves. True, in the deepest sense it is Christ uplifted who saves, to Him be all the glory.