What is "sense of duty"

Usage examples of "sense of duty".

Which was not to say he would have found the destruction of his own naval career any less agonizing simply because his own sense of duty had required that sacrifice of him.

He went on shore the same day, dined with the commissioner, to show him that he was actuated by no other motive than a sense of duty, and gave him the first intelligence that his pendant had been struck.

Obligatia looked so ill that it was impossible to understand how someone so frail could still live except through stubbornness, a sense of duty, or the simple inability to give up hope.

It had taken every bit of his reason and sense of duty to convince himself she was the logical one for this mission.

I've a suspicion that only a sense of duty to your guest has kept you from checking it.