https://www.mljtrust.org/sermons-online/acts-2-41-42/do-this-in-remembrance-of-me/

What is the church’s message? Some say it is to forget the past and that it must decide what the church is today. Dr. Martyn Lloyd-Jones argues that instead it must go back to the past and to the only authoritative source: the Bible, specifically the Acts of the Apostles. Referencing Acts 2:41–42 in this sermon titled “Do This in Remembrance of Me,” Dr. Lloyd-Jones notes that all humanity’s trouble arise because they are ignorant of God. To understand the modern world, it is this: the wrath of God is revealed against ungodliness. They are not only sinful but helpless and cannot save themselves. The church declares and demonstrates that God has done it all, and this can be seen particularly in the Communion service. There are three reasons the early church practiced Communion: first and ultimately, because Jesus commanded them in order to preserve doctrine. Secondly, Jesus instituted it to preserve the unity of the Spirit and the bond of peace. Finally, He established it to remember Him and all that He represented. This is the great message of the Christian church: Jesus of Nazareth is the Son of God, sent into the world to save humanity. This is what the early church and the Christian church have been looking back to ever since.