This hymn is used for Matins & Vespers on the Feast of St. Teresa of Avila in the Extraordinary Form. It is used for Lauds on the same Feast in the Ordinary Form.
Blest messenger of Heaven! thou didst
Thy home in childhood leave;
Intending to barbaric lands
Christ or thy blood to give.
But thee a sweeter death awaits;
A nobler fate is thine;
Pierc’d with a thousand heavenly darts,
To die of love divine.
Victim of perfect charity!
Our souls with love inspire;
And save the nations of thy charge
From everlasting fire.
Praise to the Father, with the Son,
And Holy Spirit, be;
Praise to the blessed Three in One,
Through all eternity.
Words: Pope Urban VIII, 1632; tr. Fr. Edward Caswall, C.O., 1849.
The original Latin text of this hymn may be found here.