A penetrating question. Our Lord’s words come home most when He talks in the most simple way. We know Who Jesus is, but in spite of that He says – "Will ye also go away?" We have to maintain a venturing attitude toward Him all the time.
"From that time many of His disciples went back, and walked no more with Him." They went back from walking with Jesus, not into sin, but they relapsed. Many to-day are spending and being spent in work for Jesus Christ, but they do not walk with Him. The one thing God keeps us to steadily is that we may be one with Jesus Christ. After sanctification the discipline of our spiritual life is along this line. If God gives a clear and emphatic realization to your soul of what He wants, do not try to keep yourself in that relationship by any particular method, but live a natural life of absolute dependence on Jesus Christ. Never try to live the life with God on any other line than God’s line, and that line is absolute devotion to Him. The certainty that I do not know – that is the secret of going with Jesus.
Peter only saw in Jesus Someone to minister salvation to him and to the world. Our Lord wants us to be yoke-fellows with Him.
v. 70. Jesus answers the great lack in Peter. We cannot answer for others.