[46] For the mind is the sight of the soul, shining transcendently with its own rays, by which the great and dense darkness which ignorance of things sheds around is dissipated. This species of soul is not composed of the same elements as those of which the other kinds were made, but it has received a purer and more excellent essence of which the divine natures were formed; on which account the intellect naturally appears to be the only thing in us which is imperishable,