Athanasius of Alexandria : [Those who live in a godly manner] and participate in such goodness are the only ones able to give glory to God, and that is what really constitutes a feast and a holy day. For the feast is not indulging in a lot of food or dressing up in lovely clothes. It is not enjoying days of leisure. It is acknowledging God and offering thanksgiving and songs of praise to him. But this belongs to the saints alone, who live in Christ.… That is the way it was with Hezekiah, who was delivered from death and therefore praised God, saying, "Those who are in hell cannot praise you; the dead cannot bless you; but the living shall bless you, as I do today." — FESTAL LETTER 7:3 Cosmas Indicopleustes : For they that are in the grave cannot praise thee, nor can the dead celebrate thee; nor can they that are in the grave hope for thy mercy. The living shall praise thee, even as I also do; meaning: For if Thou hadst not granted me still to live, how could I have been converted, or have repented and been saved, or have hope of Thy mercy, since the dead who are in the grave can do nothing of this kind, but in Thy compassion Thou hast graciously granted me this — The Christian Topography, Book 8 Jerome : (Verse 18) For neither the underworld will confess to you, nor death praise you: those who descend into the pit will not await your truth. For hell and death will not confess or praise you, according to what is written: For in death there is no remembrance of you (Psalms 6:5). And here confession is understood not for repentance, but for glory and praise, as we also read in the Gospel, I confess to you, O Lord, Father of heaven and earth (Matthew 11:25). Those who descend into the pit will not expect your truth, he says, but rather your mercy, better than in the Septuagint. For he who is in hell does not expect the truth of judgment, but the mercy of God, especially when the Savior descended into hell to free the captives from the depths. They transferred the dead to the same place more clearly. — Commentary on Isaiah