June 19, 2011 was Trinity Sunday. Christians worship God who comes to us a Father, Son and Holy Spirit (or Creator, Redeemer and Sustainer). This sermon explores the meaning of the doctrine of the Trinity. For some the doctrine appears archaic and divorced from life. One in three and three in one sounds like confused "theo-babble". Why do Christians insist on this teaching. Is it relevant today? This sermon attempts to demonstrate the meaning and relevance of the Living God who is eternally for us, with us and in us without ceasing to be over us as well.