And you are annoyed because you are ignorant how what is best for you happens to you and to the universe, as far as the laws of the common creation admit.

Now, as the soul combining first with one body and then with another undergoes all sorts of changes, either of herself, or through the influence of another soul, all that remains to the player of the game is that he should shift the pieces; sending the better nature to the better place, and the worse to the worse, and so assigning to them their proper portion.
CLEINIAS: In what way do you mean?
ATHENIAN: In a way which may be supposed to make the care of all things easy to the Gods.

If any one were to form or fashion all things without any regard to the whole--if, for example, he formed a living element of water out of fire, instead of forming many things out of one or one out of many in regular order attaining to a first or second or third birth, the transmutation would have been infinite; but now the ruler of the world has a wonderfully easy task.
CLEINIAS: How so?
ATHENIAN: I will explain: When the king saw that our actions had life, and that there was much virtue in them and much vice, and that the soul and body, although not, like the Gods of popular opinion, eternal, yet having once come into existence, were indestructible (for if either of them had been destroyed, there would have been no generation of living beings); and when he observed that the good of the soul was ever by nature designed to profit men, and the evil to harm them--he, seeing all this, contrived so to place each of the parts that their position might in the easiest and best manner procure the victory of good and the defeat of evil in the whole.

And he contrived a general plan by which a thing of a certain nature found a certain seat and room.

But the formation of qualities he left to the wills of individuals.