Jesus’ plan is about to come to its consummation. He has taught the disciples and shown them the power of God. He is about to leave them, which is the whole point of His preparing them. He is wanting them to understand so that they might have the joy within themselves that Jesus has. How can we have joy in the awful world of sickness, death, decay, betrayal, and misery? It is not in others or the things of this world. It is in the power of the cross and the power of the resurrection.