Eknath Easwaran's Commentary
Spiritual fulfillment is an evolutionary imperative. There comes a time in the growth of civilizations, as with individuals, when the life-and-death questions of material existence have been answered, yet the soul still thirsts and physical challenges cease to satisfy. Then we stand at a crossroads, for without meaningful aspiration, the human being turns destructive. Like a snake that must shed its skin to grow, our industrial civilization must shed its material outlook or strangle in outgrown ideals whose constructive potential has been spent.