The 6th house is the house of enemies, debts, and vulnerabilities. The Moon (Chandra) represents the heart, emotions, and deep secrets.
When the Moon sits in the 6th house, the person's emotional core is highly vulnerable to attacks. Dr. Sharma gives a strict psychological warning: Never share your deep emotional secrets or weaknesses with anyone.
If you open your heart ("dil ki baat batana") to a friend, a colleague, or even a relative, they will eventually use that exact information against you. They will weaponize your emotions, and you will deeply regret trusting them ("padega pachtana"). Keep your heart locked.