Ethics can be defined as the study of moral standards of human behavior and moral judgments. It examines concepts like good and bad and seeks to establish norms for human conduct. There are different perspectives on ethics, including seeing it as a practical science that provides rules to guide actions, or as a normative science that sets standards. Ethics studies both human acts that are done knowingly and voluntarily, as well as some involuntary acts. It aims to determine what constitutes morally good behavior. The concept of "good" can refer to things that are intrinsically good or good based on their consequences. Determining the greatest good is an ongoing discussion in philosophical thought.