Judas saith unto him, not Iscariot, Lord, how is it that thou wilt manifest thyself unto us, and not unto the world?
Judas, not the one who betrayed Jesus, could not understand how Jesus could appear to the disciples without also being seen by the world. He did not understand that the Lord would manifest Himself to His own in a spiritual manner. His own would see Him by faith, through the Word of God. By the Spirit of God, we can actually know Christ better today than the disciples knew Him when He was on earth.