Robert Traill (The Throne of Grace), Works, 1:23:
What then is this coming to the throne of grace? 1. It is in believing on Jesus Christ. This is the first approach to the throne of grace. He is the propitiation, and mercy-seat, and throne of grace, 1 John 4:10. Believing on him, is coming to him, John 6:35. It is coming to the Father by him, John 14:6. It is believing on God by him, 1 Pet. 1:21. It is believing on him, and on him that sent him, John 12:44. Believing on Jesus Christ, is an employing of Christ in way of trust, as to all his fulness of grace, and our utter indigence thereof. Whatever a man do, whatever exercises of religion he be taken up in, he never comes to the throne of grace, till his heart and soul go forth towards Jesus Christ for righteousness and life. The first right step heavenward, is saving faith in Christ. Nothing savingly good can precede it, and all saving good follows it: for faith unites the man to Christ, and all the fruits of holiness and righteousness spring from the virtue of the vine Christ; with whom the believer hath first union by grace, and then communion of Christ’s grace, by which he lives, and works, and grows.