David Lohmeyer turned up this excellent clip from the original Star Trek series:
Kirk opens the clip by referencing the Nazi “leader principle” (das Führerprinzip). Soon after Hitler’s election as chancellor in 1933, the German theologian Dietrich Bonhoeffer gave a (partial) radio address and later lectured publicly on the topic of the “leader principle” and its meaning for the younger generation. These texts are important for a number of reasons, not least of which is that Bonhoeffer compares the office of “leader” to a kind of inherent law of life (or natural law) that determines whether or not the leader is actually meeting his responsibilities and obligations. Thus the leader is not beyond the law, as the Nazi version of the principle held.