1:12-15 The people returned to God in the way of duty. In attending to God's ministers, we must have respect to him that sent them. The word of the Lord has success, when by his grace he stirs up our spirits to comply with it. It is in the day of Divine power we are made willing. When God has work to be done, he will either find or make men fit to do it. Every one helped, as his ability was; and this they did with a regard to the Lord as their God. Those who have lost time, need to redeem time; and the longer we have loitered in folly, the more haste we should make. God met them in a way of mercy. Those who work for him, have him with them; and if he be for us, who can be against us? This should stir us up to be diligent.

13. the Lord's messenger—so the priests (Mal 2:7) are called (compare Ga 4:14; 2Pe 1:21).

in the Lord's message—by the Lord's authority and commission: on the Lord's embassage.

I am with you—(Mt 28:20). On the people showing the mere disposition to obey, even before they actually set to work, God passes at once from the reproving tone to that of tenderness. He hastens as it were to forget their former unfaithfulness, and to assure them, when obedient, that He both is and will be with them: Hebrew, "I with you!" God's presence is the best of blessings, for it includes all others. This is the sure guarantee of their success no matter how many their foes might be (Ro 8:31). Nothing more inspirits men and rouses them from torpor, than, when relying on the promises of divine aid, they have a sure hope of a successful issue [Calvin].