principle

A principle is an unchanging anchor. Whether it is a moral code, a scientific law, or a logical axiom, it represents the 'first' or most basic truth from which everything else follows. In a moral context, it carries a heavy sense of integrity and rigidity. When someone acts "on principle," they are prioritizing a conceptual rule over personal convenience or emotion. This often contrasts with "pragmatism," where one might compromise a principle to achieve a practical result. In scientific or technical contexts, it is the underlying mechanism. It describes the 'how' and 'why' of a process rather than just the observation of the result. While a 'rule' tells you what to do, a 'principle' explains why that rule exists.