2. God will not only give them cause to rejoice, but will speak comfort to them, will speak it to their hearts; and it is he only that can do that, and make it fasten there. See what he will do for the comfort of all the sons of Zion. (1.) Their country shall be their tender nurse: You shall be carried on her sides, under her arms, as little children are, and shall be dangled upon her knees, as darlings are, especially when they are weary and out of humour, and must be got to sleep. Those that are joined to the church must be treated thus affectionately. The great Shepherd gathers the lambs in his arms and carries them in his bosom, and so must the under-shepherds, that they may not be discouraged. Proselytes should be favourites. (2.) God will himself be their powerful comforter: As one whom his mother comforts, when he is sick or sore, or upon any account in sorrow, so will I comfort you; not only with the rational arguments which a prudent father uses, but with the tender affections and compassions of a loving mother, that bemoans her afflicted child when it has fallen and hurt itself, that she may quiet it and make it easy, or endeavours to pacify it after she has chidden it and fallen out with it (Jer. xxxi. 20): Since I spoke against him, my bowels are troubled for him; he is a dear son, he is a pleasant child. Thus the mother comforts. Thus you shall be comforted in Jerusalem, in the favours bestowed on the church, which you shall partake of, and in the thanksgivings offered by the church, which you shall concur with. (3.) They shall feel the blessed effects of this comfort in their own souls (v. 13): When you see this, what a happy state the church is restored to, not only your tongues and your countenances, but your hearts shall rejoice. This was fulfilled in the wonderful satisfaction which Christ's disciples had in the success of their ministry. Christ, with an eye to that, tells them (John xvi. 22), Your heart shall rejoice and your joy no man taketh from you. Then your bones, that were dried and withered (the marrow of them quite exhausted), shall recover a youthful strength and vigour and shall flourish like a herb. Divine comforts reach the inward man; they are marrow and moistening to the bones, Prov. iii. 8. The bones are the strength of the body; those shall be made to flourish with these comforts. The joy of the Lord will be your strength, Neh. viii. 10.