(1.) Is their state diseased? Is it wounded? God will provide effectually for the healing of it, though the disease was thought mortal and incurable, ch. vii. 22. "The whole head is sick, and the whole heart faint (Isa. i. 5); but (v. 6) I will bring it health and cure; I will prevent the death, remove the sickness, and set all to rights again," ch. xxx. 17. Note, Be the case ever so desperate, if God undertake the cure, he will effect it. The sin of Jerusalem was the sickness of it (Isa. i. 6); its reformation therefore will be its recovery. And the following words tell us how that is wrought: "I will reveal unto them the abundance of peace and truth; I will give it to them in due time, and give them an encouraging prospect of it in the mean time." Peace stands here for all good; peace and truth are peace according to the promise and in pursuance of that: or peace and truth are peace and the true religion, peace and the true worship of God, in opposition to the many falsehoods and deceits by which they had been led away from God. We may apply it more generally, and observe, [1.] That peace and truth are the great subject-matter of divine revelation. These promises here lead us to the gospel of Christ, and in that God has revealed to us peace and truth, the method of true peace—truth to direct us, peace to make us easy. Grace and truth, and abundance of both, come by Jesus Christ. Peace and truth are the life of the soul, and Christ came that we might have that life, and might have it more abundantly. Christ rules by the power of truth (John xviii. 37) and by it he gives abundance of peace, Ps. lxxii. 7; lxxxv. 10. [2.] That the divine revelation of peace and truth brings health and cure to all those that by faith receive it: it heals the soul of the diseases it has contracted, as it is a means of sanctification, John xvii. 17. He sent his word and healed them, Ps. cvii. 20. And it puts the soul into good order, and keeps it in a good frame and fit for the employments and enjoyments of the spiritual and divine life.