The principle of every believer's life is Christ, and the means of its preservation are the promises; whose virtue and efficacy is such, as happily suits itself with the several age and condition of believers. The promises are the babes' milk by which they are nourished, the full breasts from whence they suck both grace and comfort. They are the young men's evidences, by which they are animated to combat with the wicked one, and assured of being crowned with victory over him. They are the old men's staff, upon the top of which like aged Jacob they may safely lean, and worship.

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