Names convey identity, and in the ancient world they even more so conveyed character and reputation. God has a name, and we exist to make His name great, not ours. The third commandment requires that we not take His name and unite it to something worthless. It requires that our lives be about the glory of His name.

Resources:

Exodus 20:7

Keeping the Ten Commandments, J.I. Packer

For the Fame of God’s Name: Essays in Honor of John Piper, ed. Sam Storms and Justin Taylor