From the Bible, we learn that in the Salvation of man, which comes solely by believing in Jesus Christ, we see the evidence of the Trinity of God at work.

God the Father selects,
God the Son saves by the sprinkling of his blood by which we have remission of our sins and
God the Holy Spirit sanctifies (1 Peter 1:2).

Without the work of the Trinity of God, three persons in One, one cannot be saved.

Points to ponder:
God hath sent forth the Spirit of his Son into your hearts, crying, Abba, Father. Have you believed in Jesus Christ? i.e., Have you received the Spirit of Jesus who sanctifies and saves you, so that you can address God who has selected you as Abba, Father.

1 Peter 1:2 (KJV)
2Elect according to the foreknowledge of God the Father, through sanctification of the Spirit, unto obedience and sprinkling of the blood of Jesus Christ: Grace unto you, and peace, be multiplied.