For, in the language of Heraclitus, the virtuous soul is pure and unmixed light, springing from the body as a flash of lightning darts from the cloud. But the soul that is carnal and immersed in sense, like a heavy and dank vapor, can with difficulty be kindled, and caused to raise its eyes heavenward.
PlutarchNote that the eating of flesh is not only physically against nature, but it also makes us spiritually coarse and gross by reason of satiety and surfeit.
Plutarch