The best art of memory is to be humbled at God's threatening and comforted at his promises; for sure it is, that exceeding griefs or exceeding joys leave great impressions in us.

Amongst all the faculties of the soul, there is none which sooner waxeth old than memory. Sin's obliquity hath caused the appetite still to desire yet never to be satisfied, the affections to deny obedience unto reason, the desire to swell infinite; the will is often mad, the mind lame, the memory of the best by nature forgetful, and, therefore, grace must teach us the art of memory.

So in Christ, grace upon grace, though the actings of faith be never so often repeated, which indeed is very pleasing to him. O remember, I beseech you, where your strength lieth, and know that unless you do learn this Art of Memory, it may cost you very dear, many a smarting whipping: the want of this provokes God to be sometimes severe with his beloved children.