What does it mean that God is glorious in holiness?

When the Bible describes God as 'glorious in holiness,' it refers to His outstanding and majestic purity that sets Him apart from all other gods and beings. In Exodus 15:11, this attribute is celebrated, emphasizing that God's holiness includes His unmatched excellence and power over all creation. This glory in holiness means that God is not only morally pure, but His holiness is also a source of awe and reverence. It assures believers that He is both just and merciful, capable of executing justice without compromising His nature. Hence, understanding God's glorious holiness compels us to worship Him and rely solely on His grace for redemption, as only He can save us from the consequences of our sin.