Augustine of Hippo

"For Thou, Lord, hast made me glad through Thy works; and I will rejoice in giving praise for the operations of Thy hands" [Psalm 92:4]. Ye see what he saith. Thou hast made me living well, Thou hast formed me: if by chance I do aught of good, I will rejoice in the work of Thy hands: as the Apostle saith, "For we are His workmanship, created unto good works." For unless He formed thee to good works, thou wouldest not know any works but evil. …

Exposition on Psalm 92 ↗

Jerome

For you have delighted me, O Lord, in your making, and in the works of your hands I will exult. A Christian, whatever he sees, is always built up. Nothing tears down a monk except sin. Whatever you look upon is your own edifice. You see the sky, you see the sun, you see the stars, you see the moon: this builds you up. For you ought to think and say: If the sun and the moon and the sky and the stars serve God, why should I not serve? …

Homily 21, on Psalm 91 ↗

Bonaventure

He therefore who is not illumined by such great splendors of created things is blind; he who is not awakened by such great cries is deaf; he who does not praise God on account of all these effects is mute; he who from such great signs does not advert to the first principle is a fool. Open therefore your eyes, bring near your spiritual ears, loose your lips, and apply your heart, that in all creatures you may see, hear, praise, love, and worship, magnify and honor your God, lest perchance the whole world rise up against you. …

Itinerarium Mentis in Deum, Chapter 1 ↗