Phenomenology is different from all other research methods because its field of investigation is different from other methods. What then is this difference? To understand this difference first of all , phenomenology should be differentiated from natural sciences' research methods. The first difference is , natural sciences study the world of nature , the physical nature that follows its own laws commonly known as the laws of nature. Physical nature exists in time and space and it follows the laws of time and space for example causality. Rather than having events in nature as its subject matter, phenomenology studies the purely mental phenomenon. It studies consciousness. The subject matter of phenomenology is the structure of consciousness, while every thing pertaining to time and space , to the physical nature is eliminated from the consciousness. How phenomenology attains to this aim of eliminating every thing bound by time and space , every thing physical from its subject m