אור החיים — זאת תהיה תורת המצורע ביום טהרתו

Q — Chazal derive from 'זאת תהיה תורת המצורע' that it refers to 'מוציא שם רע' — the slanderer. But why is this derashah taught here, in the parsha of purification, rather than earlier, in the parsha of the affliction itself?

A — Or HaChaim explains it through the believer's relationship to events. Tzaraat naturally resembles an illness born of melancholy and black bile, and its cure would be joy and lifting of the spirits. Yet the Torah commands the metzora to sit alone, rend his clothes, and grow his hair — measures that, naturally, would worsen such a condition, not heal it. When the person sees that despite these counter-therapeutic acts he is healed — through repentance and confession of the sin of lashon hara — he gains clear proof that the affliction was no natural illness but a consequence of his slander. Hence the lesson belongs precisely at the moment of purification, where the counterintuitive recovery proves the cause.