Our sages teach us that the Evil Inclination resides right in the heart of the holy of holies of the Beit Hamikdash, our holy Temple in Jerusalem, just as the good and evil inclinations reside side by side in a person’s heart. When a sacrifice was pleasing to Hashem, the image of a lion came down in a flame from Heaven that consumed the sacrifice on the altar. But, when a sacrifice was unworthy, the image of a dog would be come down in a similar pillar of fire, and its flames would lick the sacrifice. In other words, right there on the holiest place on earth, the epitome of holiness and its dark-side counterpart were side by side. The image of the lion and the image of the dog descended in similar pillars of fire that originated in the same place.