"I educate/ up-bring the one who doesn't know the value of me at the time I exist. Don't suppose that the ones(the things) on my wrist are the scars of razor, but they are the compensations/cost of our love, they are the teeth of the cruels."
Some parts might seem a little bit complicated, dear Gamine, please ask me if something is not clear.
Hum... It's actually, "I will educate the person who doesn't know the value of me while I exist."
Which means; "there is a person who doesn't appreciate my value/ who doesn't aware of my value when I am there/ when I exist. So I will educate/discipline her/him." (Educating and disciplining is with the same sense of saying something like "I will knock the hell out of him/her" but literally it should be "educating" )
Hope it's a bit more clear, but please ask if it's not.