The metaphor contained in the Gita gets explained

Then, Arjuna began to see God’s fearsome side. He saw all those who are slaves to their senses, tied to their satisfaction by habits and full of ego, pride and vanity being swept up and carried into the jaws and teeth of a monstrous God who chewed them until their skulls were crushed to powder. Arjuna begged to know who this monster-God was and the Lord spoke saying, “I am insatiable Time, destroyer of worlds, and I have come to consume all in my burning maw.” It was then that the Lord explained to Arjuna (the spiritual seeker on the battlefield of life) that he really isn’t losing out on anything by fighting a battle that seems like it will kill some of the people he knew as friends and teachers (i.e. forgoing the sensual pleasures that lead to harm or putting his selfish ego aside in favor of helping others) because they were doomed to die anyway. In the metaphor contained in the Bhagavad Gita, the spiritual seeker, having realized God, awakens to the “big picture” of life and sees the uselessness of clinging to the illusion of the world and forever understands that God is the only permanent Reality.