The Apostle Paul
Ephesians 1:18BSB·traditional attribution

I ask that the eyes of your heart may be enlightened, so that you may know the hope of His calling, the riches of His glorious inheritance in the saints,

John Calvin Reformed @genevareformer

18. The eyes of your understanding being enlightened. The eyes of your heart is the rendering of the Vulgate, which is supported by some Greek manuscripts. The difference is immaterial, for the Hebrews frequently employ it to denote the rational powers of the soul, though more strictly, being the seat of the affections, it means the will or desire; but I have preferred the ordinary translation. And what the riches.

Matthew Henry Presbyterian @wholebiblehenry

We have come to the last part of this chapter, which consists of Paul's earnest prayer to God in behalf of these Ephesians. We should pray for the persons for whom we give thanks. Our apostle blesses God for what he had done for them, and then he prays that he would do more for them.

Commenting on Ephesians 1:15-23

John Gill Reformed Baptist @doctorgill

The eyes of your understanding being enlightened,.... By the Spirit of God already, to see the exceeding sinfulness of sin; the insufficiency of their own righteousness; the beauty, glory, fulness, and suitableness of Christ, as a Saviour; the excellency, truth, and usefulness of the doctrines of the Gospel; in which their understandings were before dark, but now had light into them: wherefore these words are...