John Calvin Reformed @genevareformer

5. Which in other ages was not made known. He had simply called it a mystery, but now calls it a mystery of Christ, because it was necessary that it should remain hidden, until it was revealed by his coming; just as the appellation of “prophecies of Christ” may be given to those which relate to his kingdom.

Matthew Henry Presbyterian @wholebiblehenry

Here we have the account which Paul gives the Ephesians concerning himself, as he was appointed by God the apostle of the Gentiles. I. We may observe that he acquaints them with the tribulations and sufferings which he endured in the discharge of that office, Eph 3:1. The first clause refers to the preceding chapter, and may be understood either of these two ways: - 1.

Commenting on Ephesians 3:1-13

John Gill Reformed Baptist @doctorgill

Which in other ages was not made known unto, the sons of men,.... That is, which mystery of Christ, and of the Gospel, was not made known to men in general, nor so clearly as under the Gospel dispensation. Some hints were given of it to Adam, immediately after his fall; and the Gospel was before preached to Abraham, Moses, and David, and others knew...