The Moon (Chandra) represents the mind and emotions. Mars (Mangal) represents raw courage, fire, and willpower.
When these two planets sit together in a birth chart, they create the famous "Chandra-Mangal Yoga" (often associated with wealth). But Lal Kitab focuses on the psychological impact of this conjunction.
When the emotional mind (Moon) is infused with the fearless fire of Mars, the person becomes psychologically unbreakable. No matter how many difficulties, tragedies, or financial crashes they face, they will not break down and cry. They stand like a solid rock ("chattan") in the face of adversity. Their courage ("himmat") is their greatest asset.