Let our serving and devotion be to God alone. Is it possible for us to unknowingly or habitually serve other things or people more than God? Will God still be jealous if we do?
Deuteronomy 6:13-15
13 Fear the Lord your God, serve him only and take your oaths in his name.
14 Do not follow other gods, the gods of the peoples around you;
15 for the Lord your God, who is among you, is a jealous God and his anger will burn against you, and he will destroy you from the face of the land.