Person-centered therapy is a humanistic approach developed by Carl Rogers in the 1940s. It is based on concepts from humanistic psychology and the idea that individuals have the capacity for self-understanding and growth. The core principles of person-centered therapy are congruence, unconditional positive regard, and empathic understanding on the part of the therapist. The therapist aims to understand the client's internal frame of reference without judgment. Over time, person-centered therapy has evolved from a nondirective approach focused on reflection of feelings to emphasizing the therapist's understanding of the client's worldview. Contemporary person-centered therapy remains open to change and refinement while focusing on the therapeutic relationship as the key agent of growth.