Eve of Trinity Sunday

The lyrics here are translated from a Greek 3rd century version. Next time Dan Brown or somebody tells you that the church made up Jesus' divinity or the Trinity in the 4th or 5th century, sing 'em this (tune link follows lyrics),

O gladsome Light, O grace
of God the Father's face,
the eternal splendor wearing;
celestial, holy, blest,
our Savior Jesus Christ,
joyful in thine appearing.

Now, ere day falleth quite,
we see the evening light,
our wonted hymn outpouring;
Father of might unknown,
thee, his incarnate Son,
and Holy Spirit adoring.

To thee of right belongs
all praise of holy songs,
O Son of God, Life-giver;
thee, therefore, O Most High,
the world doth glorify,
and shall exalt for ever.

#36 in The Hymnal 1982