The qualification of every human act always passes through the sieve of our subjectivity, through the intellectual instruments that we have inherited to point out, indicate and judge. Therefore, in his activity the psychologist sees the need to question the way in which he analyzes the individual. This confrontation requires knowledge of the postulates of some of the most relevant philosophers in history about morality and ethics, as well as their resonance in the discipline and current psychological practice. Beyond being a work of philosophical instruction, this book seeks to be an introduction to the topic of ethics and its purpose is to offer material that allows us to think about and discuss morality as a constituent of human society and each of its members. , as well as the inevitable implication of ethical intellection in the psychological discipline. Likewise, students and professors of the Psychology major will find a reflection that seeks to answer questions such as whether the technologies of self-knowledge of philosophical schools are a legacy for understanding the practice of psychological consultation or whether the epistemic/anthropological assumptions What is desirable for human beings determines discipline and professional practice.