LORD, make me to know my end, And what is the measure of my days, That I may know how frail I am. (Psalm 39:4 from the Introit for the Sunday of the Fulfillment.)
In the Name + of Jesus. Amen. When you are young and have your life ahead of you, knowing your end and the measure of your days may not seem like something you need to think about. That's why the Church throughout the ages in her wisdom draws us to the contemplation of Christ's return and the end of all things. We are reminded that someday Jesus will return. If we are not alive when that happens then we are reminded that we will fall asleep in Him.
The Psalmist isn't trying to be gloomy or have us mope around thinking, "Oh no! Someday I'm gonna die!" Rather, he wants the Lord to remind him that death is an ever-present reality and so he needs to be safe and secure in the Lord.
Tomorrow in the Divine Service you will know your end and the measure of your days. What is your end? What is the measure of your days? Jesus! He is your life because He died and rose to give you life. He is your "end," that is, your fulfillment, since He has baptized and made you His own. His Absolution says your sins are paid for. His Body and Blood say that you will be raised up on the Last Day.
The Psalmist isn't teaching us to dwell on death. That's the world's way of measuring its days. Rather here we learn that our end, the measure of our days, is eternity in Jesus.
Therefore, go to church tomorrow and celebrate the Last Day. Look forward to and long for the return of Jesus. Because for you, dear Christian, the end is not death but rather an unending eternal joy with your Lord. In the Name + of Jesus. Amen.
Christ Jesus, be our present joy, Our future great reward; Our only glory, may it be To glory in the Lord. (O Christ, Our Hope, Our Hearts' Desire, LSB 553:5)