Q. 45 Which is the first commandment?A. The first commandment is, Thou shalt have no other gods before Me.Q. 46 What is required in the first commandment?A. The first commandment requireth us to know and acknowledge God to be the only true God, and our God; and to worship and glorify Him accordingly.We were originally created to belong to God—to have Him as our God. We were made with a God-given desire for Him and a need for Him. What a marvellous and delightful thing when God brings us back to Him as our God.

WSC Q47: First Commandment Prohibitions

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.