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Since the great foundation of fear is pain, the way to harden and fortify children against fear and danger is to accustom them to suffer pain.

John Locke, George Berkeley (2010). “Locke, Berkely & Hume”, p.106, Cosimo, Inc.
Since the great foundation of fear is pain, the way to harden and fortify children against fear and danger is to accustom them to suffer pain.