Purge me with hyssop, and I shall be clean; wash me, and I shall be whiter than snow. Psalm 51:7
Most people love a “white Christmas”—a blanket of fresh snow that has gently fallen like a silent white shroud. But why is snow white when it’s actually just made of crystals of ice? The reason is, when light waves of different frequencies (colors) hit the ice crystals, they are reflected off the snow so all the colors blend to create “white”—the color that results when all color frequencies are combined.
While the writers of the Bible may not have understood the science of white snow, they understood this: Snow was the whitest, or purest, thing they knew. Pure white snow doesn’t have any marks or stains or blemishes, and thus they equated the image with sinlessness and holiness. Daniel saw the Ancient of Days wearing a garment “white as snow” (Daniel 7:9). John saw Jesus with hair “as white as snow” (Revelation 1:14). When we see our sin, we know we need to be made as “white as snow” (Isaiah 1:18).
The more we see the holiness of God, the more we become aware of our need to be made pure as well (Psalm 51:7).
The purer your habits, the closer to God you will come. Ravi Zacharias
Psalm 51 – John Piper