2 Peter 1:15

Moreover I will endeavour By writing these things in this epistle, and by every other means in my power, while it pleases God to continue me among you; that ye may be able Through frequently reading what I here write; after my decease to have these things always in remembrance “The apostle's care in this was highly commendable; because the most important truths, if they are not remembered, have no influence on the mind. The gradation in this passage is beautiful. He proposed to put the brethren in remembrance of some revealed truths, with which they were acquainted; he proposed to do this, not once or twice, but always, as long as he lived; nay, he proposed [by leaving this written testimony among them] to put them in remembrance of these things after his death. Wherefore the ministers of the gospel, following Peter's example, ought to insist most on the things which are of most importance to their people, although they are already well instructed in them, the influence of truth depending not so much upon the knowledge, as upon the frequent recollection of it.” Macknight.