“Come now, let us reason together,” says the LORD. “Though your sins are like scarlet, they shall be as white as snow; though they are red as crimson, they shall be like wool.
Look at these sheep. They really stand out against the back drop of green grass. They are white, fluffy, and pure. White is the color of purity. Purity is a good thing. Let's look at the next picture below.
To the pure, all things are pure, but to those who are corrupted and do not believe, nothing is pure. In fact, both their minds and consciences are corrupted.
Cleanse me with hyssop, and I will be clean; wash me, and I will be whiter than snow.