Charity, love in action, is greater than faith.
And faith works by love.
Love works no ill towards their neighbor therefore love is the fulfilling of the law.
Love thy neighbor as you would yourself.
If you would not harm your neighbor why would you harm yourself.
If you harm yourself how do you love yourself.
If you harm yourself thinking not too much of yourself why would you think you have salvation.
It would seem like people that harm themselves do not believe, or do not believe they can have salvation, or do not forgive themselves.