At one given moment in Peters life, Jesus called him a “rock” and at another, “Satan.” Jesus appellations were poles apart in meaning and significance:
(1) Peter called a “rock”: When in Caesarea, Jesus asked Peter, “But whom say ye that I am?” Peter answered correctly, “Thou art the Christ, the Son of the living God” (Matt. 16:15,16). Following Peters great statement of faith, Jesus commended Peter on the basis and called him a “rock”
(2) Peter called “Satan” not because Peter did not know who the Lord really was, but
(3) When do we act like Satan'
In Matthew 16:23, the Lord not only called Peter “Satan” but He said to him, “You are an offence to me.” The Greek word for “offence” is skandalon. This is the piece of metal on a mousetrap to which a piece of cheese is attached. The Lord Jesus said to Peter, “You are Satan because you are trying to trap me into preserving my humanity in order to escape my divine purpose in life.”
This pursuit of selfish interest constitutes the greatest danger in the life of any believer.
Often in Scripture Satan is addressed through the creature he is influencing. For example, when Jesus foretold His crucifixion Peter began to rebuke Him. But Jesus rebuked Peter and said, “Get behind Me, Satan!” (Matt. 16:23) In addition, when God pronounced a curse on Satan in Genesis 3:14, 15, He addressed Satan indirectly through the serpent. So too in Ezekiel 28:11-19.