Bezeichnen die Pronomina alle dieselbe Person oder soll einer den Platz eines anderen einnehmen?

This is about fulfilling a role and assuming responsibility, not about toeing the line. But Galeazzo's question about whether the person should assume his own responsibilities or someone else's is justified.

So you'd translate the second part of the sentence with "toe the line" - fair enough. How would you translate "seinen Platz einnehmen", then, assuming it's his own and not someone else's? fulfil his role? take his place? assume his responsibilities?