It is curious that the word “duty” can prompt one to think of an external relation, since the very derivation… — Søren Kierkegaard

It is curious that the word “duty” can prompt one to think of an external relation, since the very derivation of the word suggests an internal one: for that which is incumbent upon me, not as an individual with accidental characteristics bit in accordance with my true being, certainly has the most intimate relation with myself. That is, duty is not something laid upon one but something that lies upon. When duty is regarded in this way, it is a sign that the individual is oriented within himself. Then duty will not split up for him into a multiplicity of particular stipulations, for this always indicates that he has only an external relation to duty. He has put on duty; for him it is the expression of his innermost being. When he is thus oriented within himself, he has immersed himself in the ethical, and will not run around performing duties. Therefore, the truly ethical person has an inner serenity and sense of security, for he does not have duty outside himself but within himself. the more deeply a man has structured his life ethically, the less he will feel compelled to talk about duty every moment, to worry every moment whether he is performing it, every moment to seek the advice of others about what his duty is. When the ethical is viewed properly, it makes the individual infinitely secure within himself; when it is viewed improperly, it makes the individual utterly insecure, and I cannot imagine an unhappier or more tormented life then when a person has his duty outside himself and yet continually wants to carry it out.

p. 254Source: Wikiquote · CC BY-SA 4.0