Does the Mention of God, Jesus, & the holy Spirit Prove the Trinity?
Trinitarians say that places in the Bible in which God, Jesus, and the Holy Spirit, are mentioned together prove the doctrine of the Trinity 
is true. However, the Trinity doctrine goes far beyond acknowledging the existence of God, Jesus, and the Holy Spirit. What exactly is the Trinity doctrine? A very good, concise, definition by a devoted Trinitarian expert is:
“Within the One Being that is God, there exists eternally three coequal and coeternal persons, namely, the Father, the Son and the Holy Spirit”—The Forgotten Trinity, page 23