(3.) They shall be fruitful and useful. The church is compared here to the vine and the olive, which brings forth useful fruits, to the honour of God and man. Nay, the very shadow of the church shall be agreeable (v. 7): Those that dwell under his shadow shall return—under God's shadow (so some), under the shadow of the Messias, so the Chaldee. Believers dwell under God's shadow (Ps. xci. 1), and there they are and may be safe and easy. But it is rather under the shadow of Israel, under the shadow of the church. Note, God's promises pertain to those, and those only, that dwell under the church's shadow, that attend on God's ordinances and adhere to his people, not those that flee to that shadow only for shelter in a hot gleam, but those that dwell under it. Ps. xxvii. 4. We may apply it to particular believers; when a man is effectually brought home to God all that dwell under his shadow—children, servants, subjects, friends. This day has salvation come to this house. Those that dwell under the shadow of the church shall return; their drooping spirits shall return, and they shall be refreshed and comforted. He restores my soul, Ps. xxiii. 3. They shall revive as the corn, which, when it is sown, dies first, and then revives, and brings forth much fruit, John xii. 24. It is promised that God's people shall be blessings to the world, as corn and wine are. And a very great and valuable mercy it is to be serviceable to our generation. Comfort and honour attend it.