The Israelites were given the Ten Commandments, but also very detailed instructions on how to make a tabernacle and worship God. God described to them all kinds of beautiful decorations, including two statues of angels facing the Mercy Seat (where God would meet with His people over the Ark of the Covenant). These angels were not idols, and the Israelites did not worship them. These were images that demonstrated praise and reverance for God in His temple. A Church decorated with beautiful images of Our Lord, His Blessed Mother, and the Saints glorifies God.