Mark 8:31

 Mark 8:31 says, And he began to teach them, that the Son of man must suffer many things, and be rejected of the elders, and of the chief priests, and scribes, and be killed, and after three days rise again. Jesus began to teach His disciples about what was going to happen soon.  He was going to suffer many things, be rejected by the elders and chief priests, and scribes, the religious leaders of Israel, God's chosen people, then be crucified and rise again the third day.  All the miracles that Jesus performed in this world were not His reason for being here.  They were temporary, but His death burial and resurrection for the redemption of mankind was His purpose, and it is permanent.  Verse thirty-two adds, And he spake that saying openly. And Peter took him, and began to rebuke him.  Peter rebuked Jesus for saying this.  As Christians, when God leads us to do something for Him, and we don't do it, we in effect are rebuking Jesus, Who tells us we can do all things through Him.  Verse thirty-three continues, But when he had turned about and looked on his disciples, he rebuked Peter, saying, Get thee behind me, Satan: for thou savourest not the things that be of God, but the things that be of men.  Jesus then called Peter, who had been named the Rock, Satan and told Peter to get behind, or away, from Him.  Jesus also told Peter that he savored the things of men and not the things of God.  We may be rock solid in our faith at one point, and still let the things of this world pull us away from God at another.  If we are basing our faith in God on how He gives us what we desire in this world, I believe He will tell us to get behind Him.  We must seek His will first, foremost, and always to be His faithful servants.