Boys [should be] inured from childhood to trifling risks and slight dangers of every possible description, such as tumbling into ponds and off of trees, etc., in order to strengthen their nervous system... They ought to practice leaping off heights into deep water. They ought never to hesitate to cross a stream over a narrow unsafe plank for fear of a ducking. They ought never to decline to climb up a tree, to pull fruit merely because there is a possibility of their falling off and breaking their necks. I firmly believe that boys were intended to encounter all kinds of risks, in order to prepare them to meet and grapple with risks and dangers incident to man’s career with cool, cautious self-possession...