1. That she is God's vineyard, and is under his particular care, v. 2, 3. She is, in God's eye, a vineyard of red wine. The world is as a fruitless worthless wilderness; but the church is enclosed as a vineyard, a peculiar place, and of value, that has great care taken of it and great pains taken with it, and from which precious fruits are gathered, wherewith they honour God and man. It is a vineyard of red wine, yielding the best and choicest grapes, intimating the reformation of the church, that it now brings forth good fruit unto God, whereas before it brought forth fruit to itself, or brought forth wild grapes, ch. v. 4. Now God takes care, (1.) Of the safety of this vineyard: I the Lord do keep it. He speaks this as glorying in it that he is, and has undertaken to be, the keeper of Israel. Those that bring forth fruit to God are and shall be always under his protection. He speaks this as assuring us that they shall be so: I the Lord, that can do every thing, but cannot lie nor deceive, I do keep it; lest any hurt it, I will keep it night and day. God's vineyard in this world lies much exposed to injury; there are many that would hurt it, would tread it down and lay it waste (Ps. lxxx. 13); but God will suffer no real hurt or damage to be done it, but what he will bring good out of. He will keep it constantly, night and day, and not without need, for the enemies are restless in their designs and attempts against it, and, both night and day, seek an opportunity to do it a mischief. God will keep it in the night of affliction and persecution, and in the day of peace and prosperity, the temptations of which are no less dangerous. God's people shall be preserved, not only from the pestilence that walketh in darkness, but from the destruction that wasteth at noon-day, Ps. xci. 6. This vineyard shall be well fenced. (2.) Of the fruitfulness of this vineyard: I will water it every moment, and yet it shall not be overwatered. The still and silent dews of God's grace and blessing shall continually descend upon it, that it may bring forth much fruit. We need the constant and continual waterings of the divine grace; for, if that be at any time withdrawn, we wither, and come to nothing. God waters his vineyard by the ministry of the word by his servants the prophets, whose doctrine shall drop as the dew. Paul plants, and Apollos waters, but God gives the increase; for without him the watchman wakes and the husbandman waters in vain.