The 2nd Commandment

Westminster Shorter Catechism:
Q. 49. What is the second commandment? The second commandment is: 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. You shall not bow down to them or worship them; for I, the LORD your God, am a jealous God, punishing the children for the sin of the fathers to the third and fourth generation of those who hate me, but showing love to a thousand [generations] of those who love me and keep my commandments.
Q. 50. What does the second commandment require? The second commandment requires us to receive, respectfully perform, and preserve completely and purely all the regulations for religion and worship that God has established in his word. Q. 51. What does the second commandment forbid? The second commandment forbids our worshipping God with images or in any other way not established in his word.
Q. 52. What are the reasons for the second commandment? The reasons for to the second commandment are that God totally rules over us, that we belong to him, and that he is eager to be worshipped correctly.