15 So keep watch on yourselves with care; for you saw no form of any sort on the day when the voice of the Lord came to you in Horeb out of the heart of the fire: 16 So that you may not be turned to evil ways and make for yourselves an image in the form of any living thing, male or female, 17 Or any beast of the earth, or winged bird of the air, 18 Or of anything which goes flat on the earth, or any fish in the water under the earth. 19 And when your eyes are lifted up to heaven, and you see the sun and the moon and the stars, all the army of heaven, do not let yourselves be moved to give them worship, or become the servants of what the Lord has given equally to all peoples under heaven.
Matthew Henry's Commentary on Deuteronomy 4:15-19
Commentary on Deuteronomy 4:1-23
(Read Deuteronomy 4:1-23)
The power and love of God to Israel are here made the ground and reason of a number of cautions and serious warnings; and although there is much reference to their national covenant, yet all may be applied to those who live under the gospel. What are laws made for but to be observed and obeyed? Our obedience as individuals cannot merit salvation; but it is the only evidence that we are partakers of the gift of God, which is eternal life through Jesus Christ, Considering how many temptations we are compassed with, and what corrupt desires we have in our bosoms, we have great need to keep our hearts with all diligence. Those cannot walk aright, who walk carelessly. Moses charges particularly to take heed of the sin of idolatry. He shows how weak the temptation would be to those who thought aright; for these pretended gods, the sun, moon, and stars, were only blessings which the Lord their God had imparted to all nations. It is absurd to worship them; shall we serve those that were made to serve us? Take heed lest ye forget the covenant of the Lord your God. We must take heed lest at any time we forget our religion. Care, caution, and watchfulness, are helps against a bad memory.