If the night wasn't black, could you see the moon ?
If shadows weren't black, would you play at noon?
Or can you imagine a piano without black keys ?
If darkness wasn't scary, how did the light feel?

If there is no black, what is the beauty of white ?
If dark wasn't deep, how could you feel the bright?
If coal didn't exist at all, how did you get diamond?
If there is no black, who'll make night's kingdom ?...