In order to find the truth about what happened, Tooru leads his father away from the group as they sneak into the lab.  But his father finds out what he's doing and sets an ambush for them.
So you need to use your own strength
Du musst aus eigener Kraft
Así que debes usar tu propia fuerza
Así que debes usar tu propia fuerza
Alors,
Quindi devi usare la tua forza
Então precisa usar sua força
Посему... силой своей...