Although the hidden life of God remains a mystery inaccessible by reason alone, professing God as Trinity is not meant to distance us from him. Through the Son’s incarnation and the sending of the Holy Spirit, not only are we capable of understanding the eternal relationship of intimate loving communion that is the Holy Trinity, we are able to share in it. This is why we were created, why every human heart cries out to be loved. This is why people discover themselves in the words of Jesus and leave everything to follow him. The revelation of God as a relationship explains what it means to be human.
—from the book Inspired: The Powerful Presence of the Holy Spirit by Fr. Gary Caster