Holy, holy, holy is the Lord Almighty.
Isaiah 6:3
Words: Reginald Heber, 1826. Heber wrote this hymn for Trinity Sunday while vicar of Hodnet, Shropshire, England.
Music: Nicaea John B. Dykes, in Hymns Ancient and Modern, 1861 (🔊 pdf nwc). Nicaea was the place in Asia Minor where the first Ecumenical Council was held in the year 325, and it was there that the doctrine of the Holy Trinity was promulgated.
Alternate Tune:
Holy, holy, holy! Lord God Almighty!
Early in the morning
Our song shall rise to Thee;
Holy, holy, holy, merciful and mighty!
God in three Persons, blessèd Trinity!
Holy, holy, holy! All the saints adore Thee,
Casting down their golden crowns
Around the glassy sea;
Cherubim and seraphim falling down before Thee,
Who was, and is, and evermore shall be.
Holy, holy, holy! though the darkness hide Thee,
Though the eye of sinful man
Thy glory may not see;
Only Thou art holy; there is none beside Thee,
Perfect in power, in love, and purity.
Holy, holy, holy! Lord God Almighty!
All Thy works shall praise Thy name,
In earth, and sky, and sea;
Holy, holy, holy; merciful and mighty!
God in three Persons, blessèd Trinity!