It is possible. In fact, you likely have been a mouthpiece for Satan at one point or another in your Christian life.
From that time Jesus began to show to His disciples that He must go to Jerusalem, and suffer many things from the elders and chief priests and scribes, and be killed, and be raised the third day. Then Peter took Him aside and began to rebuke Him, saying, “Far be it from You, Lord; this shall not happen to You!” But He turned and said to Peter, “Get behind Me, Satan! You are an offense to Me, for you are not mindful of the things of God, but the things of men. (Matthew 16:21-23).
But Peter said, “Ananias, why has Satan filled your heart to lie to the Holy Spirit and keep back part of the price of the land for yourself? (Acts 5:4)
Christians can unwittingly speak the Satan’s words.
Isn't it interesting that the man that Jesus rebukes for speaking Satan's words is the man who rebukes Ananias for speaking Satan's words.
Read the whole post here: Are You a Mouthpiece for Satan? – Proclaim & Defend
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