TRINITY
The doctrine of the trinity states that God is one being who exists, simultaneouly and eternally, as a mutual  indwelling of three persons. The Father
The Son and the
Holy Spirit.
Since about the 4th century this doctrine has supported "one God in 3 persons" all three distinct and co-eternal persons are ONE indivisible Divine essence.
The doctrine is known as "Trinitarianism"
The most recognized Biblical foundation of this doctrine is the Gospel of John. The word Trinity comes from "Trinita" a latin abstract known to mean "three-ness" or "three at once"
St Theophilus of Antioch about 180AD was the person who first recorded this.
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SHIELD OF TRINITY

Father - is unbegotten and non-proceeding.
Son- Begotten from the Father
Spirit - proceeds from the Father through the Son.
FOR MORE INFORMATION ON THE SACRED HEART SEE DIVINE MERCY IN THE CONTENTS.
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TRINITY INDEX
Reference in Prayer:
In the name of the Father, and the Son and the Holy Spirit
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