Leininger's Theory of Culture Care Diversity and Universality is presented as a foundational basis for the educational preparation, primary care contextual practice, and outcomes-focused research endeavours of advanced practice nursing. Discussion emphasises the value of care and caring as the essence of advanced practice nursing through the use of three modes of care, use of the Sunrise and other enablers, and the ethnonursing method. Education, research, practice, and key concepts of the theory are connected as essential components toward the provision of culturally congruent care to meet the healthcare needs of diverse individuals, families, groups, and communities by family nurse practitioners.