While there is apparently such a thing as being ridiculously positive, others have to work on how they react to difficulty and need constant encouragement. Many of my friends who are parents have one child who sees the good in everything and one who has to be convinced that the world isn’t going to end when things don’t go as planned. Why do some kids chug up the hill chanting, “I think I can. I think I can” while their sibling is thinking, “I cannot pull even so little a train over the mountain. I cannot, I cannot”?