After met you, I know what love is, also know what is pain.

遇到你之后，我知道什么是爱，也知道了什么是痛苦。

youdao

They say that falling in love with you is my life's wrong, but in love with you before I do what? I know love, hurt right pain!

他们说爱上你是我一生的错，可是爱上你以前我又做对了什么？爱过方知情深，伤过方知情痛！

youdao

"One thing I've learned over life is that you don't really know what pain is or joy is until you experience the other."

VOA: standard.2010.03.25

What I do know is that using something physical for the purposes of inflicting pain carries too much risk that it will work too well, and the coach will be the one punished in the end.

FORBES: Blistering Punishment Drill Leads School To Call For Track Coaches' Resignations