The lesson will doubtlessly center on the idea of the ultimate sacrifice that Christ made so that God would wash away our sins forever and we would have everlasting life in the Kingdom to come.
How do we manage our spiritual lives to take full account of His sacrifice. I will look for inspiration to the words of St Francis of Assisi who was speaking to a fellow brother about "Perfect Joy" . He said that it could not come from created things or fame or honors, nor even from prophecies and miracles. It could only come from self-denial and humiliations suffered in imitation of Jesus who suffered so much for everyone.
Don Wainaina on Easter.