“Instead, let's simply state that the reason and purpose of this gift is as follows: the gods invented and supplied us with vision to enable us to observe the rational revolutions of the heavens and to let them affect the revolutions of thought within ourselves (which are naturally akin to those in the heavens, though ours are turbulent while they are calm). That is, the gods wanted us to make a close study of the circular motions of the heavens, gain the ability to calculate them correctly in accordance with their nature, assimilate ours to the perfect evenness of the god's, and so stabilize the wandering revolutions within us.”
— PLATO, TIMAEUS