In our opening session, we discuss how the Trinity is a pardoxical and unique doctrine in the Christian faith. God is three-in-one: Father, Spirit, and Son. Although the term Trinity does not show up in Scripture, it is implicitly described and progressively revealed. This session explains tendencies in Trinity studies to focus on the economic Trinity and essential Trinity. Moreover, it stresses how Trinity is a safeguard against warring gods or a divine despot. God is love.