When they go to a feast and a banquet, they proceed steeply upward to the top of the vault of heaven, where the chariots of the gods, whose well matched horses obey the rein, advance easily, but the others with difficulty; for the horse of evil nature weighs the chariot down, making it heavy and pulling toward the earth the charioteer whose horse is not well trained. There the utmost toil and struggle await the soul.