Thematic Bible: A ground for obeying him exclusively

"Know therefore today, and take it to your heart, that the LORD, He is God in heaven above and on the earth below; there is no other. "So you shall keep His statutes and His commandments which I am giving you today, that it may go well with you and with your children after you, and that you may live long on the land which the LORD your God is giving you for all time."