The third commandment is certainly against common swearing, including using euphemisms so common in society. Many commonly use "gee," "gosh," "golly," "got all muddy," "cheese and rice," "Jiminy Cricket," and "doggone" to substitute for the more offensive words some carelessly spew forth. This commandment also covers the light or disrespectful use of any of God's attributes or character.
All the Divine Names and Titles in the Bible, by Herbert Lockyer, lists 364 names and titles just for Jesus Christ. Through His names and titles, God has chosen to reveal His attributes, office, authority, prerogatives, and will. Each name of God features some distinct virtue or characteristic of His nature. Thus, God has declared the glory of His nature by His names, which are not to be abused.
It is this commandment more than any other that shows how much God should be a part of our every word, deed and attitude. It shows that the test of our spiritual cleanliness is how we use the name of God, whether in truth or vanity. It indicates that a man is better off being sincerely wrong than to be a professing Christian and deny His name by the conduct of his life.
To help us know David, the Bible shows him as a shepherd, warrior, king, prophet, poet, musician and sinner, each a part of a rich nature. God is manifold times greater, yet He reveals Himself, His nature, just as the Bible reveals David. We see God in a multitude of circumstances, revealing what He is by the way He acts and reacts. He also names Himself what the circumstances reveal of Him, so whenever we see that name, it also brings to mind an aspect of His nature. Thus, He gives us a double-barreled revelation of Himself.