Inconsistent Words

I saw a funny commercial about identity theft, which showed a picture of a middle-aged man, but you heard the voice of a teenage girl speaking. They were trying to communicate that the teenage girl had stolen the identity of the man.
It was funny because the voice was inconsistent with the picture of the man. What was coming out of his mouth was not consistent with what I would expect from a middle-aged man.
Sometimes Christians use very inconsistent words. We say wonderful things about God when we pray or when we sing hymns of praise at church. At another point, that very same mouth spews out hurtful things towards classmates, sinful words of rebellion toward parents, or dirty jokes to friends. That certainly is the height of inconsistency!
James talks about the inconsistency of the tongue in James 3:9–10, “Therewith bless we God, even the Father; and therewith curse we men, which are made after the similitude of God. Out of the same mouth proceedeth blessing and cursing. My brethren, these things ought not so to be.” It is inconsistent for our mouths to say wonderful things about God and hurtful things toward others.
If you have confessed Jesus Christ as your Lord with your mouth (Rom 10:9), then your mouth belongs to God and should be constantly yielded to obey him (Rom 6:13). As a Christian, your language should be consistent with who you say you are.
What about your mouth? Are you blessing God and cursing others out of both sides of your mouth? If your mouth is glorifying God at some times and then speaking in ways that do not glorify God, I would say, like James did: My brothers, this should not be.