Most Holy Trinity, Godhead indivisible, Father, Son, and Holy Spirit, my first beginning and my last end, since You have made me after Your own image and likeness, grant that all the thoughts of my mind, all the words of my tongue, all the affections of my heart and all my actions may be always conformed to Your most Holy Will.
O Most Holy Trinity, I adore Thee who are dwelling by Thy grace within my soul.
O Most Holy Trinity, who art dwelling by Thy grace within my soul, make me love Thee more and more.
O Most Holy Trinity, who art dwelling by Thy grace within my soul, sanctify me more and more.
Abide with me, O Lord; be Thou my true joy. Amen.
May the grace of the Lord Jesus Christ, and the love of God, and the fellowship of the Holy Spirit be with you all. – 2 Corinthians 13:14
Prayer excerpted from “Prayer and Devotions to the Blessed Trinity” by http://catholicharboroffaithandmorals.com/