That is an amazing quote. Life is like a piano, the white keys represent happiness and the black keys show sadness. But as you go through life's journey, remember that the black keys also create the music.
i still find each day too short for all the thoughts I want to think, all the walks I want to take, all the books I want to read, and all the friends I want to see. - John Burroughs (I'll add, and all the sleep I want to sleep :)