God's Divine Unity & Simplicity

I want to speak to you about the Divine Trinity having 3 Persons or subsistences, but I want to set the stage for that by first speaking about God's Simplicity today; that glorious truth that our God, the Father, the Son, and the Holy Spirit are One God. They are, as Divine Persons, of one substance, power, and eternity. Each Person has the whole Divine essence, and that essence is undivided. All that is in God is God. But the principle claim of Divine Simplicity is that God is not composed of parts. God is simple because He is One. There is a Unity in God in His essence which must be recognized by all true Christians.