All these are so many blessed promises, with which the Church was to be distinguished in gospel days, when the Lord had brought home his holy word with power to the heart. Ordinances were to become blessed; Jesus alone should be blessed, and her people in her; and so endeared should the people be to the Lord, that is, Jesus's tenderness over them should be like the tenderness of a mother! We do not find this image of the mother's tenderness frequently made use of in scripture; but when it is, the Lord makes it most gracious indeed. See Isaiah 49:15.
Isaiah 66:10-14
10 Rejoice ye with Jerusalem, and be glad with her, all ye that love her: rejoice for joy with her, all ye that mourn for her:
11 That ye may suck, and be satisfied with the breasts of her consolations; that ye may milk out, and be delighted with the abundancec of her glory.
12 For thus saith the LORD, Behold, I will extend peace to her like a river, and the glory of the Gentiles like a flowing stream: then shall ye suck, ye shall be borne upon her sides, and be dandled upon her knees.
13 As one whom his mother comforteth, so will I comfort you; and ye shall be comforted in Jerusalem.
14 And when ye see this, your heart shall rejoice, and your bones shall flourish like an herb: and the hand of the LORD shall be known toward his servants, and his indignation toward his enemies.