Take ye therefore good heed unto yourselves; for ye saw no {l} manner of similitude on the day that the LORD spake unto you in Horeb out of the midst of the fire:

(l) Signifying, that destruction is prepared for all who make any image to represent God.

Wesley's Notes

4:15 In Horeb - God, who in other places and times did appear in a similitude in the fashion of a man, now in this most solemn appearance, when he comes to give eternal laws for the direction of the Israelites in the worship of God, and in their duty to men, purposely avoids all such representations, to shew that he abhors all worship of images, or of himself by images of what kind soever, because he is the invisible God, and cannot be represented by any visible image.

Scofield Reference Notes

Margin saw no manner

Cf. See Scofield Note: "Jn 1:18".

Jamieson-Fausset-Brown Bible Commentary

15. Take . good heed . for ye saw no manner of similitude-The extreme proneness of the Israelites to idolatry, from their position in the midst of surrounding nations already abandoned to its seductions, accounts for their attention being repeatedly drawn to the fact that God did not appear on Sinai in any visible form; and an earnest caution, founded on that remarkable circumstance, is given to beware, not only of making representations of false gods, but also any fancied representation of the true God.

Matthew Henry's Concise Commentary

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.