The Unity in the Trinity

A reader writes: A reader writes: "I have a question that involves the trinity and prayer. In the Lord's prayer Jesus teaches His disciples to pray and to address God as "Our Father, which art in heaven." The Lord's prayer is a complete model prayer. We believe that when we do this we address not the first person of the trinity, but the triune God. How must we understand that, seeing God is one in essence, yet three persons, Father, Son and Holy Spirit. The Father is the Creator, the Son is...