Where I am going you cannot come. (John 13:33 and 36)
Lord Jesus said this at least four times. Where is the Lord going, anyway? Up to Jerusalem for the Passover feast? Yes. But He did not go alone on that pilgrimage; many Jews accompanied Him.
Up to the Upper Room for the Last Supper? Or up to the Mount of Olives to pray? He had fewer companions in those places. But, again, He did not go alone. He had company—His Apostles.
But then even His friends abandoned Him and left Him alone.
Lord Jesus went before the Sanhedrin, and before Pontius Pilate, alone, with no human advocate. And of course He spread out His arms on His cross alone.
Only the Christ, only the divine Lamb, could offer the sacrifice that restores justice to creation. And only the new Adam could go to the realm of the dead and liberate the ancient souls who awaited Him. And only the omnipotent Creator could rise from death in a human body with such power and life that no force of nature could ever drag Him back into the grave again.
No one can accompany Christ into the inner heart of the Paschal Mystery.
But, as He said to the Apostles, we can do His will now by loving Him and each other. And, as He said to St. Peter, we can follow Him to heaven later.