Today is all about mysteries. Three Persons in one God. Rebirth, even if you’re old. Belief gives eternal life. God has come to save the world, not condemn it. The Christian faith is full of mysteries. We cannot explain these things and a host of other things, but we say they’re true—a Virgin conceives and bears a Son; God says ‘Let there be’ and fully mature things come into existence; bread and wine deliver the Body and Blood of Christ to countless altars across seven continents, even though the Jesus who comes to us returned to heaven nearly 2,000 years ago; salvation is a gift and nothing we can buy or earn. We affirm as core beliefs things that science and logic cannot verify, and even more than that, things that science and logic say are false. But St. Paul teaches us to embrace mystery. He doesn’t grapple with this, but joyfully exclaims: “Oh, the depth of the riches both of the wisdom and knowledge of God! How unsearchable are His judgments and His ways past finding out!”
The Church Year has two divisions. The first half, which we just finished, follows the life of Christ—from His birth, through His life, and to His death, resurrection, ascension, and the pouring out of the Holy Spirit. The second half of the Church Year focuses on the activity of the Holy Spirit in the Church, how He causes us to grow in the faith and in Christian living, but always keeping us grounded in the work Christ has done to win our salvation. But as a hinge between these two semesters stands today, the Feast of the Most Holy Trinity. Today we are taught about the God who acted in the life of Christ, and we learn about the God who works in us in our life today.