IV. Here is the prophet's expostulation with them, in God's name (v. 5): How long will it be ere they attain to innocency? It is not meant of absolute innocency (that is what the guilty can never attain to); but how long will it be ere they repent and reform, ere they become innocent in this matter, and free from the sin of idolatry? They are wedded to their idols; how long will it be ere they are weaned from them, ere they are able to get clear of them? so it might be rendered. This intimates that custom in sin makes it very difficult for men to part with it. It is hard to cleanse from that filthiness, either of flesh or spirit, which has been long wallowed in. But God speaks as if he thought the time long till sinners cast away their iniquities and come to live a new life. He complains of their obstinacy; it is that which keeps his anger against them burning, which would soon be turned away if they did but attain to innocency from those sins that kindled it. They in trouble cry, How long will it be ere God return to us in a way of mercy? but they do not hear him ask, How long will it be ere they return to God in a way of duty?