Let us ask God, through the intercession of St. Ephrem, to defend His Church against the snares of error and wickedness (Collect).
In medio Ecclesiae aperuit os ejus: et implevit eum Dominus spiritu sapientiae et intellectus: stolam gloriae induit eum. * Bonum est confiteri Domino: et psallere nomini tuo, Altissime.
In the midst of the Church the Lord opened his mouth: and He filled him with the spirit of wisdom and understanding: He clothed him with a robe of glory. * It is good to give praise to the Lord: and to sing to Thy name, O most High.
(Ecclesiasticus 15:5 and Psalm 91:2 from the Introit of Mass)
Deus, qui Ecclesiam tuam beati Ephraem Confessoris tui et Doctoris mira eruditione et praecteris vitae meritis illustrate volulsti: te supplices exoramus; ut ipso intercedente, eam adversus erroris et pravitatis insidias perenni tua virtute defendas.
O God, who hast willed to illuminate Thy Church by the wondrous learning and excellent merits of the life of blessed Ephrem Thy confessor and doctor: we humbly beseech Thee that through his intercession Thou mayest defend it by Thine everlasting power against the wickedness and snares of the enemy.
From the Catholic Encyclopaedia: http://www.newadvent.org/cathen/05498a.htm