As the party rests in the City of the Dead, Gus warns Will about how dangerous Valacirca is and tells him it's okay to turn back. But Will's mind is made up. All Gus can do is send him on his way with a word of advice...
But I am of no use to you 
when it matters the most.
لكن أنا غير مُفيد لك في أحلك الظُّروف
Aber ich bin dir nicht von Nutzen,
wenn es am wichtigsten ist.
Es un momento clave
y no te sirvo de nada.
Es un momento clave
y no te sirvo de nada.
Je ne te suis d’aucune utilité
au moment crucial.
Invece sono inutile 
proprio nel momento del bisogno.
Mas sou inútil quando sou mais necessário.
Но в самый трудный час
я совсем для тебя бесполезен.