Ver. 15. I will meditate on thy precepts.
See this "I will" repeated again and again (Psalms 119:48; Psalms 119:78). In meditation it is hard (sometimes at least) to take off our thoughts from the pre-engagements of other subjects, and apply them to the duty. But it is harder to become duly serious in acting in it, harder yet to dive and ponder; and hardest of all to continue in an abode of thoughts, and dwell long enough, and after views to make reviews, to react the same thinking, to taste things over and over, when the freshness and newness is past, when by long thinking the things before us seem old. We are ready to grow dead and flat in a performance except we stir up ourselves often in it. It is hard to hold on and hold up, unless we hold up a wakeful eye, a warm affection, a strong and quick repeated resolution; yea, and without often lifting up the soul to Christ for fresh recruits of strength to hold on. David, that so excellent artist in this way, saith he will meditate, he often saith he will. Doubtless, he not only said "I will" when he was to make his entrance into this hard work; but likewise for continuance in it, to keep up his heart from flagging, till he well ended his work. It is not the digging into the golden mine, but the digging long, that finds and fetches up the treasure. It is not the diving into the sea, but staying longer, that gets the greater quantity of pearls. To draw out the golden thread of meditation to its due length till the spiritual ends be attained, this is a rare and happy attainment. Nathanael Ranew, 1670.
Meditation is of that happy influence, it makes the mind wise, the affections warm, the soul fat and flourishing, and the conversation greatly fruitful. Nathanael Ranew.
Another reason why it's good to memorise Scripture!