Interpretation of the Gospel.

First, concerning Faith

in the Holy Trinity.

Since today the feast of the Holy Trinity The "Holy Trinity" refers to the Christian doctrine that God exists as three persons—Father, Son, and Holy Spirit—but is one individual being. is being held and celebrated in the Christian Church, for which today’s Gospel reading has been appointed—because the distinction between the three divine persons in the work of the New Birth of man, or the conversion of the sinner, is shown very clearly therein—we wish first, before we hear from the Gospel itself, to briefly consider and recount what the Holy Trinity is, and the faith concerning the Holy Trinity.

Although this point is indeed difficult for those who are untrained, especially in our times when so little is taught correctly about it, and when almost everyone is frightened away from the knowledge of the Holy Trinity—as Luther also writes in his Postil Postil: a collection of sermons or commentaries on the appointed biblical readings for the church year regarding this Gospel, stating that he does not know how God the Father, Son, and Holy Spirit are one thing, and that one should not [try to] know it, etc.—even if human reason cannot grasp such a thing (no more than how three can be one and one can be three), nevertheless, true faith can indeed grasp it. And it is, strictly speaking, the article of the divine Trinity that is the sole Christian faith; as Jerome St. Jerome (c. 347–420 AD), a Doctor of the Church famous for translating the Bible into Latin. also says: the knowledge of this mystery is the salvation of the faithful.