Q. 52 What are the reasons annexed to the second commandment?A. The reasons annexed to second commandment are, God's sovereignty over us, His propriety in us, and the zeal He hath to His own worship.Idolatry is an expression of man's hatred for God. Look at how Romans 1 shows this. We make images of God because we don't like the truth about God (Rm 

, 28). The problem is not that we are lacking in information about God (Rm 1:19-20). You can see how the modifications are described in verses 22 & 23. We make Him out to be a creature—like us! We want to creaturefy God because we find Him too holy and too just for our liking. The primary act of idolatry (now that Jesus has come) is the rejection of the gospel.

WSC Q53: 3rd Commandment Introduction

The idea of imparting a body of truth (rudiments of the faith) is found repeatedly in scripture under many different terms and descriptions. We are not given a complete catechism or confession in the Bible. That is because we are to write our own according to the needs of the day. They must refute new heresies as they arise. Our Lord has called us to catechise in His church… to teach disciples the basics of the faith. Make the most of this instruction: memorise your Catechism, listen to the messages, and pray for the Spirit to work.