There are times when the mind is dealt such a blow it hides itself in insanity. While this may not seem beneficial, it is. There are times when reality is nothing but pain, and to escape that pain the mind must leave reality behind.
Sleep marks passing time, giving us distance from the things that have hurt us. When a person is wounded they will often fall unconscious. Similarly, someone who hears traumatic news will often swoon or faint. This is the mind's way of protecting itself from pain.
That was another lesson I had learned perhaps too well: people meant pain.
Perhaps the greatest faculty our minds possess is the ability to cope with pain.