Gregory of Nyssa

One who reflecting on this holds cheaply all that mankind prizes, whose only love is the divine life, because "all flesh is grass, and all the glory of man as the flower of grass," can never care for this grass which "to-day is and to-morrow is not"; studying the divine ways, he knows not only that human life has no fixity, but that the entire universe will not keep on its quiet course for ever; he neglects his existence here as an alien and a passing thing; for the Saviour said, "Heaven and earth shall pass away," the whole of …

On Virginity 4 ↗

Oecumenius

Because all flesh is as grass, and all the glory of man as the flower of the grass. The grass withers, and the flower falls away: but the word of the Lord endures forever. Now this is the word which by the gospel was preached to you. Because all flesh is grass. …

Commentary on 1 Peter ↗

Bede

Because all flesh is like grass, etc. Therefore, just as perishable flesh generates perishable flesh, so the word of the Lord, which remains forever, gives eternal life in both flesh and soul to those whom it regenerates from water. Saint Cyprian, in his book on the Dress of Virgins, thus recalls this testimony: "Isaiah's God, he says, proclaims: All flesh is grass, and all its glory is like the flower of the field. …

Commentary on the Catholic Epistles ↗