Isaiah was a firsthand witness of God’s holiness in his vision described in Isaiah 6. Even though Isaiah was a prophet of God and a righteous man, his reaction to the vision of God’s holiness was to be aware of his own sinfulness and to despair for his life (Isaiah 6:5). Even the angels in God’s presence, those who were crying, “Holy, holy, holy is the LORD Almighty,” covered their faces and feet with four of their six wings. Covering the face and feet no doubt denotes the reverence and awe inspired by the immediate presence of God (Exodus 3:4–5). The seraphim stood covered, as if concealing themselves as much as possible, in recognition of their unworthiness in the presence of the Holy One. And if the pure and holy seraphim exhibit such reverence in the presence of the Lord, with what profound awe should we, polluted and sinful creatures, presume to draw near to Him! The reverence shown to God by the angels should remind us of our own presumption when we rush thoughtlessly and irreverently into His presence, as we often do because we do not understand His holiness