A coherent tradition of mystical thought in the Christian Middle Ages can be described in terms taken from the Bible, Augustine, and the Eastern Christian neoplatonist known to the West as Denys. Augustine sought an intellectual vision of God, but the medieval tradition wanted to go beyond vision to "ecstasy" or "the darkness above the light" or "passing into God." Meister Eckhart in the 14th century reintroduced the Plotinian theme of a deep inner unity between God and the soul that is higher than intellectual vision as well as the ultimate reality in the depth of the soul.