Introduction Throughout history, the philosophical perspective of “self” has received a myriad of descriptions and analyses from a host of philosophers, researchers and even scholars. In gaining this understanding, these people are important in explaining how the knowledge of this concept affects the world and how people perceive themselves and their ultimate relationships with others. An understanding of “self,” therefore, affirms a person’s identity in a social environment, allowing him/her to recognize others besides oneself (Sorabji 13). In other words, the way human beings socialize solely depends on the way they perceive themselves and others through daily social interactions. Innumerable philosophers, including Socrates and Aristotle, have immensely contributed towards gaining clarity in defining “I.” Yet, it is believed that some have been quite outstanding with regard to their input. In this category lies Rene Descartes, whose findings remain essential in defining the concept of “self” and how this definition affects people’s thinking and interactions. This paper goes miles ahead in synthesizing Descartes’ findings in order to achieve a concise definition of the word “I” that seems reasonable and critical from a philosophical perspective of the “self.” This essay further digs into several research findings unearthed by renowned scholars and experts who have devoted their time and sacrificed their resources to studying and exploring the definition and how it influences interpersonal relationships in one’s life. By compiling ideas from an array of thinkers, this philosophy of “self” essay intends to explore the implications of defining “I” in a given manner and how such a stance would affect our self-reflection and perceptions of ourselves or how we treat ourselves. The survey also focuses on how these definitions would affect our knowledge of ourselves and of the world outside our “selves.” Rene Descartes Born in 1596, in France, Rene Descartes was a great philosopher, thinker, writer and mathematician who spent his adulthood in the Republic of Dutch. He has arguably been dubbed as the father of modern philosophy with special emphasis on the Western school of thought (Smith 1). As a result, his pieces of writing remain key reference materials for scholars across the global plane. For example, meditations continue serving as principal text books in philosophy departments of most universities in the world today. His contribution in mathematics set unbeaten record with his efforts being widely applied in calculus and geometry. In development of natural sciences, his input cannot go unnoticed. He believed that philosophy was a mega entity that encompassed all aspects of knowledge expressed through it. Although most of the works and thoughts have been widely considered, there has been a strong emphasis on Meditations on First Philosophy. As mentioned before, this essay will put emphasis on the second meditation in defining the concept of “I”, also known as “self”. Meditations on First Philosophy These meditations are considered as the origin of modern western philosophy. In this coverage, Descartes criticizes most of Aristotle’s arguments and designs questions that have rema