There is still another vital aspect to the “why” of Jesus’ departure. He said, “If I do not go away, the Helper (Paraclete) will not come to you; but if I depart, I will send Him to you.” Jesus’ departure was tied to Pentecost. There is no Pentecost without ascension. As the invested King of kings, Jesus had the authority together with the Father to send His Holy Spirit in a new and powerful way upon the church. Jesus spoke of a certain necessity of His leaving in order for the Spirit to come. Herein was another great advantage. He declared, “Ye shall receive power, after that the Holy Ghost has come upon you” (Acts 1:8, KJV).
Two remarkable things happened to the disciples after Jesus departed. The first is that they “returned to Jerusalem with great joy” (Luke 24:52). They were not despondent over the departure of Jesus. Obviously they finally understood why He was leaving. They understood what, for the most part, the church since then has failed to understand. We live as if it would not have been better for Jesus to leave.
The second obvious change in the lives of the disciples was in their spiritual strength. After Pentecost, they were different people. No longer did they flee like sheep without a shepherd. Instead, they turned the world upside down. They turned the world upside down because they fully understood two simple things: the “where” and the “why” of Jesus’ departure.