John Chrysostom

"For the earth which drinketh in the rain that cometh oft upon it," he says, "and bringeth forth meet herbs." Because nothing is so meet as purity of life, nothing so suitable as the best life, nothing so meet as virtue. "And bringeth forth" (saith he) "herbs meet for them by whom it is dressed, receiveth blessing from God." Here he says that God is the cause of all things, giving the heathen a blow, who ascribed the production of fruits to the power of the earth. …

Homily on Hebrews 10 ↗

Theophylact of Ohrid

By "earth" he calls the soul, and by "rain" – teaching, as also in another place: "I will command the clouds," says God, "not to pour... rain" upon the vineyard (Isa. 5:6). And again: "the river of God is full of water" (Ps. 65:10), that is, he who has received from God the gift of teaching others is filled with waters from above, or gifts. …

Commentary on Hebrews ↗

Oecumenius

"For the earth, which produces." In the parable, he speaks of the land and the people, he rain, however, is called the teaching, as elsewhere, "I command the clouds," says God, "not to rain upon the vineyard;" (Isa. 5:2) and again, "the river of God was filled with waters;" (Ps. 144:10) these, he who, having been graced by God to teach, was filled with the waters from above, that is, with gifts. …

The Pseudo-Oecumenian Catena on Hebrews ↗

Thomas Aquinas

293. – Having showed the difficulty involved in pursuing his intention, a difficulty arising from their guilt, the Apostle now resorts to a simile to explain this: first, in regard to good earth; secondly, in regard to bad earth (v. 8). 295. – But the simile which is presented here about the earth can be connected to that which was stated above, let us go on to things more perfect, and then the sense will be: If we go on we will have a blessing like the good earth; or it can be connected with what was just said according to both …

Commentary on Hebrews ↗