The Rebbe clarifies that self-harm for profit is forbidden, even if not done in jest, as one’s body belongs to Hashem. He explains why neglecting a mitzvah labels one a rasha, adding depth to sources in Tanya and Talmud. He also notes that Mashiach, as king, surpasses Moshe in certain ways, and should head the “Kings” section rather than Moshe.
https://www.torahrecordings.com/rebbe/004_igros_kodesh/adar/923