The scriptural context of this blog’s title and question can be found in Matthew 16:21-23:
21 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.
22 Then Peter took Him aside and began to rebuke Him, saying, “Far be it from You, Lord; this shall not happen to You!”
23 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.”
To paraphrase, Christ announced to his disciples that he would be killed in Jerusalem, but would be resurrected on the 3rd day. This was God’s will for Christ and the lesson for us here is that no matter how difficult the mission, God’s will must be completed. Anything or anyone opposed to God’s will is an obstacle to God’s mission.
In other words, Peter was speaking in the “flesh”, and not looking at the big spiritual picture. Once we learn to overcome the flesh and become more spiritually minded it becomes easier to line up with God’s will.
The Hebrew definition of the word “Satan” is one who resists or is an adversary. Regardless, of whether Peter’s response was a direct influence from the most known adversary: the devil, we should remember that if you are not for God’s will, you are in support of devil who is the ruler of this world. With God, everything is black or white with no gray areas.