Pacem in Terris §30

³⁰ Once this is admitted, it follows that in human society one man's natural right gives rise to a corresponding duty in other men; the duty, that is, of recognizing and respecting that right. Every basic human right draws its authoritative force from the natural law, which confers it and attaches to it its respective duty. Hence, to claim one's rights and ignore one's duties, or only half fulfill them, is like building a house with one hand and tearing it down with the other.