Only now, as we feel the onslaught behind us, do we begin dimly to apprehend why the animals fought, begot, and died; and behind them the plants; and behind these the huge reserve of inorganic forces. We are moved by pity, gratitude, and esteem for our old comrades-in-arms. They toiled, loved, and died to open a road for our coming. We also toil with the same delight, agony, and exaltation for the sake of Someone Else who with every courageous deed of ours proceeds one step farther. All our struggle once more will have a purpose much greater than we, wherein our toils, our miseries, and our crimes will have become useful and holy.