I will surely hide my face - Withdraw my approbation and my protection. This is a general meaning of the word in Scripture.

I will surely hide my face in that day,.... Which is repeated for the certainty of it, and that it might be taken notice of; that he was the spring and source of all their good things, their sun and their shield, who being withdrawn from them, they would be deprived of every thing that was good, and be liable to all evil; and this he would do:

for all the evils which they shall have wrought; for all the immoralities they should be guilty of, every transgression of his law, whether of the first or second table, and especially idolatry:

in that they are turned unto other gods; to the worship and service of them, which of all evils would be the most provoking to God; and the way of speaking suggests as if all evils were included in idolatry, and sprang from it, or were committed with it.

And I will surely hide my face in that day for all the evils which they shall have wrought, in that they are turned unto other gods.

31:14-22 Moses and Joshua attended the Divine Majesty at the door of the tabernacle. Moses is told again that he must shortly die; even those who are most ready and willing to die, need to be often reminded of its coming. The Lord tells Moses, that, after his death, the covenant he had taken so much pains to make between Israel and their God, would certainly be broken. Israel would forsake Him; then God would forsake Israel. Justly does he cast those off who so unjustly cast him off. Moses is directed to deliver them a song, which should remain a standing testimony for God, as faithful to them in giving them warning, and against them, as persons false to themselves in not taking the warning. The word of God is a discerner of the thoughts and intents of men's hearts, and meets them by reproofs and correction. Ministers who preach the word, know not the imaginations of men; but God, whose word it is, knows perfectly.