Philosophical thoughts and beliefs are the undercurrent in bioethics. Ethnophilosophy, ideological philosophy, professional philosophy, and philosophic sagacity are the learning of philosophy. Philosophy has to be separated from popular wisdom. Many of our beliefs and traditions have insufficient reasoning. Moreover, a consistent attitude is also not present. Common sense and sagacity merge to evolve the philosophical belief in a society. “Philosophy literally means love of wisdom” consists of rationalizing the fundamentals of nature, existence and reality. A figure related to the methods of philosophy has been presented in this chapter, which is very helpful for students or readers.