Mark 8:31-35

And He began to teach them that the Son of Man must of necessity suffer many things and be tested and disapproved and rejected by the elders and the chief priests and the scribes, and be put to death, and after three days rise again [from death]. And He said this freely (frankly, plainly, and explicitly, making it unmistakable). And Peter took Him by the hand and led Him aside and then [facing Him] began to rebuke Him. But turning around [His back to Peter] and seeing His disciples, He rebuked Peter, saying, Get behind Me, Satan! For you do not have a mind intent on promoting what God wills, but what pleases men [you are not on God's side, but that of men]. And Jesus called [to Him] the throng with His disciples and said to them, If anyone intends to come after Me, let him deny himself [forget, ignore, disown, and lose sight of himself and his own interests] and take up his cross, and [joining Me as a disciple and siding with My party] follow with Me [continually, cleaving steadfastly to Me]. For whoever wants to save his [higher, spiritual, eternal] life, will lose it [the lower, natural, temporal life which is lived only on earth]; and whoever gives up his life [which is lived only on earth] for My sake and the Gospel's will save it [his higher, spiritual life in the eternal kingdom of God].