In this passage, written during the Israelites' wondering in the wilderness, God gave the Israelites a clear command to avoid looking to or making idols. After giving this command, God tells the Israelites why He gave it. He commanded the Israelites to avoid idols because He is their God.
I would like for everyone to note that there is a contrast here. God told the Israelites not to turn to idols because they were not God. God identified Himself as God. He did not intend for there to be any doubt in the minds of the Israelites that He alone is God. An idol would only cause confusion, taking away the worship of the One True God, the God of Israel.
What does this passage mean for us today? I would like to point out that, even though we may not make carved images for idols, we may still have something in our lives that has taken the place of God. If there is such a thing in our lives, it is an idol. This (or these) idol(s) must be dealt with. We are to worship God and God alone.
We should be giving God first place in our lives. If He says to do it, do it. If He says not to do it, then do not do it. We must trust Him. We must choose to love Him with all of our hearts. An idol seeks to disrupt this. An idol becomes a distraction that takes us away from worshipping God and serving Him. Therefore, we should resolve to examine ourselves to determine if there is anything that we value more than God. If there is anything, then we must take it out of God's place, and return God to His proper place in our lives. Let us all resolve to do this today.