The third house is of the native’s strength and stamina. So, when the 3rd House Lord In 3rd House, the natural factor of the third house becomes better. So the person can be very courageous. The native can be full of self-confidence. If the lord of the third house is naturally malefic then the native can be very courageous as compared to the natural auspicious planet as the lord of the third house. The third house is of self-efforts. So the lord of the third house being in the third house indicates that the native can achieve success with his efforts. He can live life with his efforts and hard work.