As the Lord is transfigured in the presence of Peter, James, and John, He reminds them of who He is and prepares them for the discomfort of the Cross, but the glory of the Kingdom.
Readings are found at http://www.usccb.org/bible/readings/031719.cfm
Give feedback at https://goo.gl/forms/iG1Tvk4cHTGhdOWz2