'You should have come back at the same time.' said the fox. 'If for example you come at four o'clock in the afternoon, I shall start feeling happy at three o'clock. As the time passes. I shall feel happier and happier. At four o'clock, I shall become agitated and start worrying; I shall discover the price of happiness. But if you come at just any time, I shall never know when I should prepare my heart to greet you...One must observe certain rites.'