Dualism is the coexistence of two opposing features that are interconnected but structurally different. Dialectical thinking is a way of thinking that focuses on overcoming the contradictions between opposites in the same whole. In other words, dialectics is to reason on at least two contradictory assumptions by doubting the accuracy of one-dimensional appearances of even the phenomena that are thought to be clear and precise at first glance, and to reach a consensus by overcoming the dilemma with the subsequent analysis process. Dualism, the coexistence of opposites, may be a characteristic mental feature of patients with borderline personality organization. The dualist perspective can also explain the splitting and other related defense mechanisms underlying the borderline personality organization. In these patients, two thoughts that seem to be completely opposite to each other can be integrated with a dialectical approach due to the effect of the splitting defense mechanism. The dialectical style, which focuses on the harmony of opposites and is dynamic and fertile in itself, is thought to be suitable for dynamic psychotherapy. The dialectical approach can guide the restructuring of the pathological mind, which is almost divided between two contradictory propositions in dynamic therapy, which has difficulty in understanding duality. Consider By employing dialectical thinking, patients can develop new perspectives, diverging from their traditional and customary approaches. This process allows them to arrive at new syntheses and achieve personal growth. Dialectical thinking style, which emphasizes that the same thing can have both good and bad sides, can spread from the therapy room to other areas of life over time and reduce the emotional irregularities experienced. Dialectical approach is a method used in psychotherapy.