One day, the Lord Jesus took Peter, James, and John up on a mountain, and was transfigured before their eyes. His clothes became as bright as the sun, Moses and Elijah were seen speaking with him about his upcoming passion, and the Father’s voice was heard declaring that he was his Son.
All this was a sign to those apostles that they should not be troubled by the events that would unfold. The betrayal and crucifixion of Jesus were to fulfill the Father’s plan for our salvation.
The Transfiguration is also a sign to us. Circumstances can make us forget that every human life is part of the Father’s plan, and that the glory of God is to be seen in every person, no matter how burdensome, unplanned, or ill that person may be.