God's (True) Two-Step
Food: For they are life unto those that find them, v. 22. As the spiritual life was begun by the word as the instrument of it, so by the same word it is still nourished and maintained. We could not live without it; we may by faith live upon it.
They are a medicine to all their flesh (so the word is), to all their corruptions, for they are called flesh, to all their grievances, which are as thorns in the flesh. There is in the word of God a proper remedy for all our spiritual maladies.
We must maintain a holy jealousy of ourselves, and set a strict guard, accordingly, upon all the avenues of the soul; keep our hearts from doing hurt and getting hurt, from being defiled by sin and disturbed by trouble; keep them as our jewel, as our vineyard; keep a conscience void of offence; keep out bad thoughts; keep up good thoughts; keep the affections upon right objects and in due bounds. Keep them with all keepings (so the word is); there are many ways of keeping things—by care, by strength, by calling in help, and we must use them all in keeping our hearts; and all little enough, so deceitful are they, Jer. 17:9.
in general, all the actions of the life flow from the heart, and therefore keeping that is making the tree good and healing the springs. Our lives will be regular or irregular, comfortable or uncomfortable, according as our hearts are kept or neglected.