In heaven all the “thoughts of our hearts” will be out in the open, but now they are hidden. Someone is considered to be an enemy but perhaps he is a friend. Someone else looks like a friend but is possibly a hidden enemy. What darkness we live in! This one roars at us and he loves; this one whispers “sweet nothings” in our ear and he hates. Judging by their words, I should flee from a friend and cling to an enemy.

—Augustine, Sermon 49.4