This lecture introduces the fundamental concepts of ethics in engineering, focusing on the importance of acting ethically and analyzing ethical dilemmas. It explores the principle of non-harm, the construction of common will-projects, and the relationship between knowledge and action. The lecture delves into the complexities of ethical thinking, emphasizing the inseparability of intellectual and moral conscience. It also discusses the ethical implications of knowledge in decision-making processes. Additionally, it addresses the ethical considerations related to the impact of human actions on the environment and society, emphasizing the need for ethical judgment in engineering practices.