Today, each reading makes reference to the Holy Trinity. God has made himself known in different stages of history in three different persons, but they are, at the same time, the same and unique God: Father, Son and Holy Spirit.
This seems like a simple statement to understand; however, it is not easy to talk about God. It is not easy to talk about something that is so distant and so mysterious. "No one has ever seen God." It belongs to another order of being. But at the same time he is deeply involved in creation, because it is His creation and because we are His creatures.
When we look at creation, when we look at ourselves and the wonder which is, for example, our own body. We experience God as creator, who has brought us out of nothing and has given us life. We recognize Christ as the Son of God according to what is written in the Gospels. And He himself made us known and transmitted to us the third person of the Trinity, the Holy Spirit. His apostles and disciples felt the presence of the Spirit of God. That Spirit inspired them and encouraged them to announce the good news of the Kingdom. Today He continues to inspire and encourage many to continue with this announcement of salvation for all. This is our faith, this is the faith that we glory in professing.