“Hear, O Israel: The Lord our God, the Lord is one!” (Deuteronomy 6:4, Mark 12:29).
The Lord is one.
He is the only true God.
He has revealed Himself as the Father, Son and Holy Spirit.
The Father and Jesus Christ are in heaven.
The Holy Spirit fills heaven and is throughout and over all the earth.
The Holy Spirit is the Spirit of the Father, the Spirit of Jesus Christ.

The supreme purpose of man is to know God.
The greatest, highest and only privilege for man is to know Him.
Someone may ask, what is God like? What is the Father, Son and Holy Spirit like?
He is the most wonderful, most beautiful Person in the universe.