Blessed solemnity of the Most Holy Trinity, God the Father, God the Son (Jesus) and God the Holy Spirit!
This song was written based on this Scripture reading from the letter of St. Paul to the Ephesians
Ephesians 4: 1-6
I therefore, a prisoner in the Lord, beseech you that you walk worthy of the vocation in which you are called,  With all humility and mildness, with patience, supporting one another in charity.  Careful to keep the unity of the Spirit in the bond of peace.  One body and one Spirit; as you are called in one hope of your calling.  One Lord, one faith, one baptism.
 One God and Father of all, who is above all, and through all, and in us all.