Josiah had received a message from God that there was no preventing the ruin of Jerusalem, but that he should deliver only his own soul; yet he did not therefore sit down in despair, and resolve to do nothing for his country because he could not do all he would. No, he would do his duty, and then leave the event to God. A public reformation was the thing resolved on; if any thing could prevent the threatened ruin it must be that; and here we have the preparations for that reformation. 1. He summoned a general assembly of the states, the elders, the magistrates or representatives of Judah and Jerusalem, to meet him in the house of the Lord, with the priests and prophets, the ordinary and extraordinary ministers, that, they all joining in it, it might become a national act and so be the more likely to prevent national judgments; they were all called to attend (2Ki 23:1, 2Ki 23:2), that the business might be done with the more solemnity, that they might all advise and assist in it, and that those who were against it might be discouraged from making any opposition. Parliaments are no diminution at all to the honour and power of good princes, but a great support to them. 2. Instead of making a speech to this convention, he ordered the book of the law to be read to them; nay, it should seem, he read it himself (2Ki 23:2), as one much affected with it and desirous that they should be so too. Josiah thinks it not below him to be a reader, any more than Solomon did to be a preacher, nay, and David himself to be a door-keeper in the house of God. Besides the convention of the great men, he had a congregation of the men of Judah and the inhabitants of Jerusalem to hear the law read. It is really the interest of princes to promote the knowledge of the scriptures in their dominions. If the people be but as stedfastly resolved to obey by law as he is to govern by law, the kingdom will be happy. All people are concerned to know the scripture, and all in authority to spread the knowledge of it. 3. Instead of proposing laws for the confirming of them in their duty, he proposed an association by which they should all jointly engage themselves to God, 2Ki 23:3. The book of the law was the book of the covenant, that, if they would be to God a people, he would be to them a God; they here engage themselves to do their part, not doubting but that then God would do his. (1.) The covenant was that they should walk after the Lord, in compliance with his will, in his ordinances and his providences, should answer all his calls and attend all his motions - that they should make conscience of all his commandments, moral, ceremonial, and judicial, and should carefully observe them with all their heart and all their soul, with all possible care and caution, sincerity, vigour, courage, and resolution, and so fulfil the conditions of this covenant, in dependence upon the promises of it. (2.) The covenanters were, in the first place, the king himself, who stood by his pillar (2Ki 11:14) and publicly declared his consent to this covenant, to set them an example, and to assure them not only of his protection but of his presidency and all the furtherance his power could give them in their obedience. It is no abridgment of the liberty even of princes themselves to be in bonds to God. All the people likewise stood to the covenant, that is, they signified their consent to it and promised to abide by it. It is of good use to oblige ourselves to our duty with all possible solemnity, and this is especially seasonable after notorious backslidings to sin and decays in that which is good. He that bears an honest mind does not shrink from positive engagements: fast bind, fast find.