There is simply no way to wall off some isolated portion of the greater surrounding reality and make everything permanently predictable and safe within it. Some of what has been no-matter-how-carefully excluded will always sneak back in. A serpent, metaphorically speaking, will inevitably appear. Even the most assiduous of parents cannot fully protect their children, even if they lock them in the basement, safely away from drugs, alcohol and internet porn. In that extreme case, the too-cautious, too-caring parent merely substitutes him or herself for the other terrible problems of life. This
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