Thus will I do. — What is he about to do? It is left in awful uncertainty, but the doom is wrapt up in the boundless possibilities of the Divine judgment involved in the drawing very near of the Lord Himself, to execute what He has said and sworn by His Holiness in Amos 4:2-3. All that had previously been done in famine, drought, blighting pestilence, and earthquake, was not final, and had failed in its effect. The summons to meet God in some other unknown form than these is very solemn.
Related Commentaries of Amos 4:12
Amos 4:12
12 Therefore thus will I do unto thee, O Israel: and because I will do this unto thee, prepare to meet thy God, O Israel.