The beautiful hymn Veni Creator Spiritus
is ascribed to him. One stanza clearly bears the mark of the Filioque
: Per te sciamus da Patrem
noscamus atque Filium,
te utriusque Spiritum
credamus omni tempore.
"Grant that through you we know the Father,
and also recognize the Son,
that we believe in you always,
the Spirit of them both."
According to the Ancrene Wisse
(a 13th century English rule for anchoresses - female recluses), it was used very much like our Heavenly King
troparion - to begin all prayer.
Hwen ye earst ariseth, blescith ow ant seggeth, In nomine Patris et Filii
et Spiritus sancti, Amen. Ant biginneth anan, Veni, Creator Spiritus,
with up ahevene ehnen ant honden toward heovene, buhinde o cneon forth-
ward up-o the bedde, ant seggeth swa al the ymne ut with the verset, Emitte spiritum
tuum, ant te ureisun, Deus, qui corda fidelium.
understand it heretically, though.
In the Sarum (English) rite, the priest would pray it every time after vesting for Mass. In the WRO version of the Sarum Mass that stanza is altered to read:
"The Father may we know through Thee,
And through Thee may we know the Son.
Thee, Spirit sent from the Father
May we believe throughout all time."