Doctor angelice, sancte Thoma, theologorum princeps et philosophorum norma, praeclarum Christiani orbis decus et ecclesiae lumen, scholarum omnium Catholicarum caelestis patrone, qui sapientiam sine fictione didicisti et sine invidia communicas, ipsam Sapientiam, Filium Dei, deprecare pro nobis, ut, veniente in nos spiritu sapientiae, ea quae docuisti intellectu conspiciamus et quae egisti imitatione compleamus; doctrinae et virtutis, quibus in terris solis instar semper eluxisti, participes efficiamur; ac tandem earum suavissimis fructibus perenniter tecum delectemur in caelis, Divinam Sapientiam collaudantes per infinita saecula saeculorum. Amen.

Angelic Doctor, St. Thomas, prince of theologians and model of philosophers, bright ornament of the Christian world and light of the Church; O heavenly patron of all Catholic schools, who didst learn wisdom without guile and dost communicate it without envy, intercede for us with the Son of God, Wisdom itself, that the spirit of wisdom may descend upon us, and enable us to understand clearly that which thou hast taught, and fulfil it by imitating thy deeds; to become partakers of that doctrine and virtue which caused thee to shine like the sun on earth; and at last to rejoice with thee for ever in their most sweet fruits in Heaven, together praising the Divine Wisdom for all eternity. Amen.

A shorter invocation, before study:
O blessed Thomas, patron of schools, obtain for us from God an invincible faith, burning charity, a chaste life, and true knowledge, through Christ our Lord. Amen.