What are perfect duties and how do they differ from imperfect duties?

Perfect duties are moral obligations that are clear, specific, and absolute, such as the duty not to lie or steal. They are duties that must always be followed without exception. Imperfect duties, on the other hand, are more general and flexible moral obligations, such as the duty to help others or improve oneself. These duties do not have a specific set of actions that must be followed in every situation.