In the same way that the second commandment is more about the worship of God, and not just an artistic limit on depicting Him, is the same way that the third commandment is more than just a prohibition of using God’s names and titles in irreverent ways.
The command states:
“You shall not take the name of the Lord your God in vain, for the Lord will not hold him guiltless who takes his name in vain.” – Exodus 20:7 (ESV)
We usually take this from our context and assume it means to not use the name “Jesus” or God in cursing, or flippantly. This will click in your mind once I say it, but in addition to that, think of “taking God’s name” in a marriage and/or covenantal sense. In a way the deeper meaning point not just to our speech, but our entire way of life, because we (Christians) take on the name of God. We are His people, as were the Israelites hearing this from Moses. To bear the name of God is a serious reference point for one’s identity and way of life. Because of our actions the name of God can be either glorified or dragged through the mud.