You shall acknowledge no God but me, no Savior except me.

Hosea 13:1-8
But I have been the Lord your God ever since you came out of Egypt. You shall acknowledge no God but me, no Savior except me.
5 I cared for you in the wilderness,in the land of burning heat. When I fed them, they were satisfied; when they were satisfied, they became proud; then they forgot me.
7 So I will be like a lion to them, like a leopard I will lurk by the path.
8 Like a bear robbed of her cubs, I will attack them and rip them open; like a lion I will devour them—a wild animal will tear them apart.
Israel may turn to Baal and other idols, but there is in fact no God but God(實際上沒有神，只有神). People may forget him, or discount him, but he exists: and he has power to carry out all that he has warned of.
Why?
Israel received the grace of God, so they became prosper and satisfied, when they were satisfied, they became proud, then they forgot God. Is is easy to live under poor but hard to live under prosper situation.
Proud is the first step of downfall in our life. 
God is righteousness and jealous to evil. so fear the Lord and always acknowledge no God but the Lord.
How?
Be aware there is no god but the Lord. Be humble before the Lord!