Jesus affirms the prediction of Isaiah. He reveals to His disciples what is to happen to Him and His followers. "The Son of Man must suffer greatly and be rejected by the elders, chief priests, and the scribes, and be killed and rise after three days." (Mark 8:27-35) It was also important for Him to let His disciples know who He was. So He asked them the question, "Who do people say that I am?" The immediate response from the people indicates that it was not clear to them who He was. Guided by the Holy Spirit, Peter spoke out, "You are the Christ." He said it correct. Then Jesus revealed something more that was going to happen, that the Son of Man must suffer greatly...... That was another hard truth to understand. If He was going to suffer and die what future did the disciples have? He summed up His teaching by saying, "whoever wishes to come after me must deny himself, take up his cross, and follow me. For whoever wishes to save his life will lose it, but whoever loses his life for My sake and that of the gospel will save it."
That is the mystery of the cross and its glory. History and experience have taught us that all the armies that ever marched, and all the navies that ever sailed, and all the parliaments that ever sat, and all the kings that ever reigned, put together, have not affected the life of man upon this earth as has that one solitary life - the life of Christ. We lift up our eyes to gaze on the cross and share in that glory. The Lord upholds my life.