Readings for Holy Trinity Sunday

John 3:1-17; Acts 2:22-36; Isaiah 6:1-8

The first Sunday after Pentecost is, by long Christian tradition, Holy Trinity Sunday. It is a day made special by the fact that it celebrates not a Biblical event, but a Biblical truth – that God is three distinct persons (Father, Son, and Holy Spirit) in one divine essence. And the readings for the day all touch on some aspect of this truth.

Jesus describes the work of the Trinity while teaching Nicodemus about how things work in the Kingdom of God (John 3). Peter, still preaching his Pentecost sermon, does the same as he calls the people of Israel to repent and believe in Christ (Acts 2). The prophet Isaiah sees a vision of the LORD on his throne. The seraphim sing “holy, holy, holy”, reminding us of God’s 3-in-1 nature (Isaiah 6). But even more does Isaiah’s vision remind us that the doctrine of the Holy Trinity – like God Himself – is not a puzzle to be solved. It is a mystery to be revered.

When you run up against a mystery in life, how are you inclined to react? Do you find mysteries like the Holy Trinity more comforting or more challenging to your faith?