This document discusses the Christian doctrine of the Trinity. It defines the Trinity as believing in one God that exists as three distinct persons - God the Father, God the Son (Jesus Christ), and God the Holy Spirit. Each person is fully God yet there is only one God. The document provides biblical support for distinguishing each person as God while also being the same God. It then discusses what the Trinity is not, such as views held by Arians, Macedonians, modalists, etc. Finally, it discusses how Jews, Jehovah's Witnesses, Mormons, and Muslims view the Trinity.