This essay provides a comprehensive analysis of theoretical perspectives in nursing care, focusing on evidence-based practice (EBP) as a core nursing theory. It explores the evolution of EBP, its impact on nursing education and research, and its benefits for both patients and nurses, such as improved patient outcomes and reduced costs. The essay also delves into the author's personal nursing philosophy, emphasizing empathy, compassion, and lifelong learning, and how this philosophy is applied in practice. Furthermore, it examines the importance and applicability of theory-guided nursing practice, highlighting how nursing theories provide direction, improve patient care, and enhance the nurse's role in the healthcare community. The paper underscores the significance of integrating theory into clinical practice to improve patient outcomes and foster a deeper understanding of the nursing profession.