1) To do more than duty requires 
• (v. i.) To do more than duty requires; to perform works of supererogation; to atone (for a dificiency in another) by means of a surplus action or quality.
Su`per·er'o·gate intransitive verb [ imperfect & past participle Supererogated ; present participle & verbal noun Supererogating .] [ Latin supererogatus , past participle of supererogare to spend or pay out over and above...
supererogate To do more than is required, ordered, or expected.
to do more than duty requires.