"Second, this light proceeded from God, who "hath shined into our hearts." Which God did this? It was the God who, in the original creation, "commanded the light to shine out of darkness."
God must shine into the heart to bring such enlightenment that we grasp the truth and our hearts are made willing to desire the true essence of felicity. Everyone, like the apostle, must pray for this: "That the God of our Lord Jesus Christ, the Father of glory, may give unto you the spirit of wisdom and revelation in the knowledge of him: the eyes of your understanding being enlightened; that ye may know what is the hope of his calling, and what the riches of the glory of his inheritance in the saints, and what is the exceeding greatness of his power to us-ward who believe, according to the working of his mighty power" (Eph. 1:17-19). Without the illumination of the Spirit, man dwells in darkness (Eph. 5:8); therefore, we are in need of this treasure (2 Cor. 4:7).
The heart is the place into which God must shine; an outward form will not suffice. A person is not converted if his conduct is somewhat blameless before the world or if he is religious merely as a matter of routine. The heart must be renewed. What matters here is the inward and hidden man of the heart (1 Peter 3:4; Eph. 3:16; 2 Cor. 4:16). The mind, the will, and the affections, and thereafter also the entire outward man, must be renewed, illuminated, transformed, and converted (Col. 1:13; Eph. 4:23; Col. 3:10).