The soul leaves all surface appearances, not only those that can be grasped by the senses but also those which the mind itself seems to see, and it keeps on going deeper until by the operation of the spirit it penetrates the invisible and incomprehensible, and it is there that it sees God. The true vision and the true knowledge of what we seek consists precisely in not seeing, in an awareness that our goal transcends all knowledge....

St. Gregory of Nyssa (c. 335-394)