I think if you took away some of the your's there would be more of an impact
like you could do :
Your life has to be painfully lived
Your heart has to painfully beat
Your mind has to be painfully processed
Your words mean nothing
the mind hurts your being,
thoughts hurt your existence
Your memories hurt your future
and do couplets or leave it spaced out as it is. but i don't think you need that many your's or try a different word in place of it and it would still have the same message