But when the goodness of God and His love
for mankind appeared,
He saved us —
not by works of righteousness that we had done,
but according to His mercy,
through the washing of regeneration
and renewal by the Holy Spirit.
He poured out this Spirit on us abundantly
through Jesus Christ our Savior,
so that having been justified by His grace,
we may become heirs with the hope of eternal life.
Here is a great and full reference to the classic Christian doctrine of the Trinity. God the Father, God the Son and God the Holy Spirit are clearly delineated in this passage. You can also find clear Biblical reference to the Divine Trinity in Ephesians 2:18 and 2 Corinthians 13:13. No other faith system or world religion describes God in such terms. It is a uniquely Christian doctrine and is critical to our understanding of exactly who God is and how He works in our world, in our lives and in His church.
It seems no coincidence that in this Trinitarian passage the true plan of salvation is also laid out clearly. Salvation is by grace through faith alone. Regeneration comes by the indwelling Holy Spirit who has been poured out upon the justified by Father God. It is not by works of righteousness but through the faithfulness of the only Righteous One. All of this is bound up in the eternal love of God which has been displayed on the cross by Jesus and poured into our hearts by the Holy Spirit.
It is by the strength of His grace that we live in His love for the glory of His Name. Hallelujah!