“Self-doubt is that part of the soul that is able to taste the bitter in life as well as the sweet. It is open to a side of life that a sunny disposition must ignore in order to carry on smiling. It is less interested in pretense and more aware of the suffering entailed in daily living. It is realistic about the balance of suffering and happiness, but because of this realism is willing to be thankful for whatever genuine happiness is possible. It celebrates the melancholy nature of aloneness, but because of its refusal to shirk aloneness knows the worth of a real relationship.”