John Chrysostom

And after these virtues let us seek, which together with our own salvation will be able in the greatest degree to profit our neighbor. Such is almsgiving, such is prayer, or rather even this latter is by the former made efficacious, and furnished with wings. "For thy prayers," it is said, "and thine alms are come up for a memorial before God." But not prayers only, but fasting also hath its strength from hence. …

Homily on Matthew 77 ↗

Theophylact of Ohrid

Since the True Eye and Great Judge knows that even great deeds, without faith, are dead, He also sends an Angel who affirms the significance of their deeds, so that those who strive well may be crowned with faith. From the vision, fear was aroused in Cornelius, however, a moderate fear, only as much as was necessary to arouse his attention. Then the words of the Angel dispelled the fear. …

Commentary on Acts ↗