A:
The reasons annexed to the second commandment are, God's sovereignty over us,1
his propriety in us,2
and the zeal he hath to his own worship.3

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Psalm 95:2-3.
Let us come before his presence with thanksgiving, and make a joyful noise unto him with psalms. For the LORD is a great God,
and a great King above all gods.
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Psalm 45:11.
So shall the king greatly desire thy beauty: for he is thy Lord; and worship thou him.
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Exodus 34:14.
For thou shalt worship no other god: for the LORD, whose name is Jealous, is a jealous God.