Theme resolves on *spoilers*
...the final word, 'me'.
'This one's for me' is the end of a long journey of inner struggle to redeem himself from the years spent working in a corrupt machine. Even though his sacrifice is unsuccessful, spelling the death of the girlfriend, it is the writer's grateful recognition of this sacrifice from the corrupt side that frees wiesler from guilt. And this theme catches us as the camera freezes a split second after the first, long-awaited and yet understated reveal of wiesler's self-judgement.