A principle is a fundamental truth, law, or belief that serves as the foundation for a system of beliefs or behavior or a chain of reasoning
. It can be a basic idea or rule that explains or controls how something happens or works
. Principles can be normative rules of conduct, doctrines, or assumptions
. They guide people's actions and decisions and can be used to evaluate behavior or situations. Examples of principles include the laws of nature, the principles of democracy, and the principle of personal responsibility
