After celebrating the saving work of the Son, and the sending of the Holy Spirit. Today we celebrate the Most Holy Trinity.
On the surface, the concept of the trinity can seem at times like some abstract idea that doesn't really effect my daily life. But it is, in fact, absolutely essential to our Christian Faith.
St Mathew tells us to go and baptize, "In the name of the Father and of the Son and of the Holy Spirit." But again we are left with why?
The three great monotheistic religions of the world agree that there is only one God, but for us as Christians, relationality (Love) is so much a part of the nature of God that within that unity there must be more than one person. For us loving isn't just something God does; it's what God is. Most religious people would say they believe God loves them. We go further. We say it is Gods very nature.
And if we are created in the image and likeness of God, it is our nature. "It is not good for the man to be alone." We are created to live in love, with one another and with God. Multiple persons each with its unique identity and yet in perfect unity. They way God is and the way God created us to be.
Defining sin is easy. It's selfishness. Think of any sin and at its core you will see that it is a manifestation of selfishness, putting your want,your desire ahead of others, breaking the relationship we are suppose to have with one another.
The trinity is at the core of our theology, our anthropology, our morality. It is what makes us Christian.