_Thirdly_, If you would make an unchangeable covenant, with an unchangeable God, come furnished with and maintain upon your hearts, an abundant measure of self-distrust; labour to be thoroughly convinced of your own nothingness and disability. "By his own strength shall no man prevail." Surely, thine own treachery may inform thee, and thine own backslidings may convince thee, to confess with Jeremiah, "O Lord, I know (I know it by sad experience) the way of man is not in himself: It is not in man that walketh to direct his steps." Staupitius confessed to Luther, that he thought in his very conscience he had above a thousand times renewed his covenant with God, and as many times broken it: a sad confession, and yet how many among us may take up the like lamentation! Be convinced of it, I beseech you, and maintain the sense of this conviction upon your spirits. Say oft within yourself, I am nothing, worse than nothing. This treacherous heart of mine will betray me into the breach of my covenant, if the Lord leave me to myself, I shall one day fall by the hand of my corruptions. He that walks tremblingly, walks safely. In the _Fourth_ place, be often renewing your resolutions. It was the exhortation of that good man to the new converts at Antioch, where they were first called Christians, "that they should cleave unto the Lord with full purpose of heart." This covenant, I have shewed you, is the ordinance whereby you cleave unto the Lord, the joining ordinance. Oh! do it with full purpose of heart, and be often putting on fresh and frequent resolutions, not to suffer every base temptation of Satan, every deceitful, or malignant solicitation of the world, every foolish and carnal suggestion of the flesh, to bribe and seduce you from that fidelity which you swear this day to Jesus Christ and the kingdoms. A well grounded resolution is half the work, and the better half too; for he that hath well resolved, hath conquered his will; and he that hath conquered his will, hath overcome the greatest difficulty: no such difficulty in spiritual things, as to prevail with one's own heart. With these cords, therefore, of well bottomed resolutions, be oft binding yourselves to your covenant, as once Ulysses did himself to his mast, that you may not be bewitched by any Syrenian song of the flesh, world, or the devil, to violate your holy covenant, and drown yourselves in a sea of perdition. And to that end, it would not be altogether useless, to fix your covenant in some place of your houses, or bed-chamber, where it may be oftenest in your eyes, to admonish you of your religious and solemn engagements, under which you have brought your own souls. The Jews had their "phylacteries, or borders upon their garments," which they did wear also upon their heads, and upon their arms; which, tho' they abused afterward, not only to pride, making them broader than their first size or pattern, in ostentation and boasting of their holiness,