One of the greatest things God does when we believe is purge our sins from us. He purges our sin with hyssop and makes us white as snow. what is hyssop but it is medical plant used by religious leaders. Hyssop was offer to Jesus on the cross. It was to numb the pain Christ was experience, but he refused it. The pain of a sinner is the pain and discomfort of knowing what we are doing is against God, and leaves an ache in our heart. When Christ purges our sin, he takes and removes the pain not with drug, but with His presence in our heart when we let him in. He purges the guilt of sin, knowing He came to live in our hearts despite our unworthiness to have him enter our hearts. . He came because he loved us first. He knocked, not because we asked him to visit, but we opened the door of our hearts to allow him to enter.