(2.) It is here promised in the particular instances of those things that shall be the beauty and honour of the church, which are knowledge, holiness, and love, the very image of God, in which man was created, renewed, and restored. And these are the sapphires and carbuncles, the precious and pleasant stones, with which the gospel temple shall be enriched and beautified, and these wrought by the power and efficacy of those doctrines which the apostle compares to gold or silver, and precious stones, that are to be built upon the foundation, 1 Cor. iii. 12. Then the church is all glorious, [1.] When it is full of the knowledge of God, and that is promised here (v. 13): All thy children shall be taught of the Lord. The church's children, being born of God, shall be taught of God; being his children by adoption, he will take care of their education. It was promised (v. 1) that the church's children should be many; but lest we should think that being many, as sometimes it happens in numerous families, they will be neglected, and not have instruction given them so carefully as if they were but few, God here takes that work into his own hand: They shall all be taught of the Lord; and none teaches like him. First, It is a promise of the means of instruction and those means authorized by a divine institution: They shall all be taught of God, that is, they shall be taught by those whom God shall appoint and whose labours shall be under his direction and blessing. He will ordain the methods of instruction, and by his word and ordinances will diffuse a much greater light than the Old-Testament church had. Care shall be taken for the teaching of the church's children, that knowledge may be transmitted from generation to generation, and that all may be enriched with it, from the least even to the greatest. Secondly, It is a promise of the Spirit of illumination. Our Saviour quotes it with application to gospel grace, and makes it to have its accomplishment in all those that were brought to believe in him (John vi. 45): It is written in the prophets, They shall be all taught of God, whence he infers that those, and those only, come to him by faith that have heard and learned of the Father, that are taught by him as the truth is in Jesus, Eph. iv. 21. There shall be a plentiful effusion of the Spirit of grace upon Christians, to teach them all things, John xiv. 26. [2.] When the members of it live in love and unity among themselves: Great shall be the peace of thy children. Peace may be taken here for all good. As where no knowledge of God is no good can be expected, so those that are taught of God to know him are in a fair way to prosper for both worlds. Great peace have those that know and love God's law, Ps. cxix. 165. But it is often put for love and unity; and so we may take it. All that are taught of God are taught to love one another (1 Thess. iv. 9) and that will keep peace among the church's children and prevent their falling out by the way. [3.] When holiness reigns; for that above any thing is the beauty of the church (v. 14): In righteousness shall thou be established. The reformation of manners, the restoration of purity, the due administration of public justice, and the prevailing of honesty and fair dealing among men, are the strength and stability of any church or state. The kingdom of God, set up by the gospel of Christ, is not meat and drink, but this righteousness and peace, holiness and love.