fourth sort of madness. It is a proof, he says, that will convince "the wise if not the clever". The soul (245c–249d) He begins by briefly proving the immortality of the soul. A soul is always in motion and as a self-mover has no beginning. A self-mover is itself the source of everything else that moves. So, by the same token, it cannot be destroyed. Bodily objects moved from the outside have no soul, while those that move from within have a soul. Moving from within, all souls are self-movers, and hence their immortality is necessary. Then begins the famous chariot allegory. A soul, says Socrates, is like the "natural union of a team of winged horses and their charioteer". While the gods have two good horses, everyone else has a mixture: one is beautiful and good, while the other is neither. As souls are immortal, those lacking bodies patrol all of heaven so long as their wings are in perfect condition. When a soul sheds its wings, it comes to earth and takes on an earthly body that then seems to move itself. These wings lift up heavy things to where the gods dwell and are nourished and grow in the presence of the wisdom, goodness, and beauty of the divine. However, foulness and ugliness make the wings shrink and disappear. In heaven, he explains, there is a procession led by Zeus, who looks after everything and puts things in order. All the gods, except for Hestia, follow Zeus in this procession. While the chariots of the gods are balanced and easier to control, other charioteers must struggle with their bad horse, which will drag them down to earth if it has not been properly trained. As the procession works its way upward, it eventually makes it up to the high ridge of heaven where the gods take their stands and are taken in a circular motion to gaze at all that is beyond heaven. What is outside of heaven, says Socrates, is quite difficult to describe, lacking color, shape, or solidity, as it is the subject of all true knowledge, visible only to intelligence. The gods delight in these things and are nourished. Feeling wonderful, they are taken around until they make a complete circle. On the way they are able to see Justice, Self-control, Knowledge, and other things as they are in themselves, unchanging. When they have