Justice is a weapon. It can be used to cause harm, but it cannot protect or save others.

To see what is right without doing it bespeaks an absence of courage. Like master, like man. It's a teaching of the late Hokage.

— You people are cops?! Now I know there’s no hope for justice in the system!
— If you’ve got a problem with the world, change yourself. If that's a problem, close your eyes, shut your mouth, and live like a hermit.

I am evil? I am Justice! I protect the innocent and those who fear evil. I'm the one that will become the god of a new world that every one desires! But those who resist God... they are evil!

But… if there is justice in revenge then that same justice will breed only more revenge… and trigger a cycle of hatred.