"He who can wait for what he desires takes the course not to be exceedingly grieved if he fails of it; he, on the contrary, who labors after a thing too impatiently thinks the success when it comes is not a recompense equal to all the pains he has been at about it."

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'Tell me one last thing,' said Harry. 'Is this real? Or has this been happening inside my head?' Dumbledore beamed at him, and his voice sounded loud and strong in Harry's ears even though the bright mist was descending again, obscuring his figure. 'Of course it is happening inside your head, Harry, but why on earth should that mean it is not real?'

— J. K. Rowling