This hexagram is named "Ge," meaning "Revolution." It reveals the principles that when implementing change, one must seize the opportune moment and win people's trust. One must be decisive and act swiftly, yet also assess the situation and avoid acting rashly. When reform is necessary, one must first establish the direction of innovation, prepare thoroughly, and wait for the right time to gain people's trust and achieve good results. One must not be rigid and unyielding, nor adopt a casual attitude, as failure to reform will harm the future. Water over fire signifies mutual transformation, as water can extinguish fire and fire can dry up water. Furthermore, Dui represents metal and Li represents fire; fire melting metal causes it to change form, symbolizing revolution. Li also represents the middle daughter and Dui the younger daughter. The middle daughter residing below the younger one, and two women sharing a room, indicates an unfavorable situation where their interests do not align, leading to disharmony. Therefore, reform is needed.