Jesus told them that he would be leaving. He even went so far as to say it would be better for them.
But I tell you the truth: It is for your good that I am going away. Unless I go away, the Counselor will not come to you; but if I go, I will send him to you. (Jn. 16.7)
We are to long for the return of Jesus, praying Maranatha and speeding the day of his return. In the meantime, Jesus says it’s better that he is not here!
Can you imagine what it would be like if Jesus were physically on earth right now? It would be like a five-year olds soccer game. All of the children start the game in their positions but as soon as the game starts they all, en masse, swarm the ball and follow it wherever it goes. If Jesus were here that’s what we Christians would do.
For now, we have a kingdom to seek…So Christ went up, the Spirit came down and the Church went out.