"Suppose someone has frequently flown in his dreams and finally becomes conscious of a power and an art of flying just as soon as he starts dreaming, as though it were his privilege, and also his most personal and enviable happiness: one who believes he can realize every sort of curve and angle with the lightest impulse, who knows the feeling of a certain divine frivolity, an "upwards" without tension or duress, a "downwards" without condescension and humiliation--without gravity! How could a man who enjoyed such dream-experiences and dream-habits fail to discover in the end that the word "happiness" was differently colored and defined in his waking hours as well? How could he fail to--desire happiness differently?"
"I fly in dreams, I know it is my privilege, I do not recall a single situation in dreams when I was unable to fly. To execute every sort of curve and angle with a light impulse, a flying mathematics--that is so distinct a happiness that it has permanently suffused my basic sense of happiness."