Hosea 5:4-6

But God in the meantime not only shows here, that there was no more any remedy for the diseases of the people; but he also gravely and severely reprobates their iniquity, because they thought not of seeking reconciliation with their God; as though he said, “What, then, do I require of these wretched men, but to return to their God? This they ought to have done of their own accord; but now, when they are admonished, they care not; on the contrary, they fiercely resist wholesome instruction. Is not this a strange and monstrous madness?” We hence see that there is an important meaning in the words, They will not apply their endeavors to return to their God; for the Prophet might have simply said, “to return to Jehovah,” or “to God;” but he says, to their God, and he says so, because God had made himself familiarly known to them, nay, brought them up in his own bosom, as though they were his children and he their Father: they had forsaken him and had become apostates; and when the Lord would now reprove this perfidy, was it not strange that the people should close their ears and harden their hearts against every instruction? We hence see how sharp this reproof is.

And he says, Because the spirit of wantonness is in the midst of them; that is, they are so pleased with their own filthiness, that there is no shame, no fear. But the reason of this comparison, which I have before explained, must be borne in mind. As a wife, though not faithful to her husband, yet retains still some modesty, as long as she continues at home, and while she is in any place classed with faithful and chaste women; but when she once enters a brothel, and openly prostitutes herself to all, when she knows that her baseness is universally known, she then throws off every shame, and entirely forgets her own character: so also the Prophet says, that the spirit of wantonness was in the midst of the people of Israel; as though he said, “The Israelites are so imbrued with their superstitions, that they cannot now be touched or moved by any reverence for God; they cannot be restored to the right way, for the devil has demented them, and having cast off every shame, they are like abominable strumpets.”

And he afterwards adds, Jehovah they have not known By this sentence the Prophet extenuates not the sin of the people, but, on the contrary, amplifies their ingratitude, because they had forgotten their God, who had so indulgently treated them. As they had been redeemed by God’s hand, as the teaching of the law had continued among them, as they had been preserved to that day through God’s constant kindness, it was truly an evidence of monstrous ignorance, that they could in an instant adopt ungodly forms of worship, and embrace those corruptions which they knew were condemned in the law. It was surely an inexcusable wickedness in the people thus to withdraw themselves from their God. This is the reason why the Prophet now says, that they knew not Jehovah. But if they were asked the cause, they could not have said that they had no light; for God had made known to them the way of salvation. Hence, that they knew not Jehovah, was to be imputed to their perverseness; for, closing their eyes, they knowingly and willfully ran headlong after those wicked devices, which they knew, as it had been stated before, to be condemned by God.