Friends, today we come to Trinity Sunday, which has been called “the preacher’s nightmare.” But as you probably know from previous sermons of mine, I don’t agree with that at all. I think every Sunday is Trinity Sunday. The Trinity names what is most fundamental and basic in our whole theology and spirituality, and we should rejoice in talking about it! Today, let’s look at the Trinity through three lenses: the words of Scripture, an analogy from St. Augustine, and the viscerally real “so what” of salvation.

Friends, we come to the great Feast of Pentecost—the feast, par excellence, of the Holy Spirit. A critique of the Western Church is that we don’t speak sufficiently of the third person of the Trinity, and there might be some truth to that. I’d like to follow Vatican II in trying to bring the Holy Spirit very much into the forefront. Our readings today show us the great power of the Spirit—a power that unleashes great saints, fiery speech, and a liberating unity. Surrender your life over to the Holy Spirit, and—trust me—you will tap into this source of power to change things for the better.

Friends, right at the end of the Easter season and in anticipation of Pentecost, we come to the great Feast of the Ascension of the Lord. We should do a theological reflection on this feast—how we should and shouldn’t understand the Ascension, and what it means for Christ’s work in the world—because it is key to understanding the dynamics of the Christian life.

Friends, on this Sixth Sunday of Easter, the Church gives us a kind of foretaste of Pentecost. In all three readings, we hear descriptions of the work of the Holy Spirit—the animating principle of the Mystical Body. What are the signs that the Holy Spirit is at work? Let’s look at five of them.

Friends, there is an enormously important line in our first reading today that we might just pass over: “The number of the disciples in Jerusalem increased greatly; even a large group of priests were becoming obedient to the faith.” Priests were so important in Jewish religious life, and these priests knew that Jesus was the fulfillment of the whole tradition of temple sacrifice. We, all the baptized, do not just admire Christ’s supreme priesthood from afar; we participate in it.