duty to be moral
... that German philosopher Immanuel Kant believed that an action must be performed out of duty to be moral?
... that German philosopher <a href="./Immanuel_Kant" id="mwB98" rel="mw:WikiLink" title="Immanuel Kant">Immanuel Kant</a> believed that an action must be performed out of <b id="mwB-A"><a href="./Kantian_ethics" id="mwB-E" rel="mw:WikiLink" title="Kantian ethics">duty to be moral</a></b>?