No pain could be depper, if I can't love her

[Theone]

Is there anyone who could recognize this sentence?

Yesterday, i saw a TV programe, called "대한민국 1교시"

Almost end of the show, 성시경 came out and talked about his experience in acting as a musical performer in broadway.

U know, he had kinda big chace to be a performer as he is a star.

He acted , maybe one scene as a beast in "Beauty and the Beast", and I tried to concentrate on his voice, acting, gesture, something like that.

"NO pain could be depper, if I can't love her "  was quoted from the song which 성시경 sang at that scene.

I don't think his acthing was pretty good, but his voice was really beautiful and touching.