Before Moshiach’s coming, says the Talmud, “all governments will turn to heresy. ”Why should wholesale moral degradation be a sign of imminent redemption? The Talmud explains by citing a counterintuitive law from this week’s Torah reading: “He has turned completely white; he is pure," meaning that if one's whole body turns the color of the tzara'as malady, he is actually pronounced ritually pure.
How are we to understand the Talmud’s prediction about Moshiach as well as this strange law of tzara’as?
Based on Likkutei Sichos vol. 32, pp. 77-83.