By this logic one could construct a golden lamb and call it sacred. After all, Jesus was the Lamb of God. Similarly, one could erect an image of Jesus as a shepherd and worship it; after all, He was "the good shepherd. In the extreme, one could even erect a figure of Christ on a cross call it sacred; after all, He hung there to pay for our sins.
Let's review Exodus 20:4-5
4 "You shall not make for yourself an idol in the form of anything in heaven above or on the earth beneath or in the waters below. 5 You shall not bow down to them or worship them; for I, the LORD your God, am a jealous God,
Continue reading in the Old Testament.
Many people, as an act of repentance, put on sackcloth, and sat in ashes and fasted.
Please do not concentrate on just one verse when there are many others that contradict—I don’t have an online concordance that I like so I can’t quote chapter and verse to you — but the acts of these people in the Old Testament are there. So what is so terrivle about the act of repentance in getting a cross marked on one’s forehead with askes?
Look at the facts as presented in the Bible, please. ALL the facts, not just one verse.