This paper proposes that the philosophy of Bernard Lonergan can provide insight into the challenge of integrating nursing theory, research and practice. The author discusses Lonergan's work in regard to reflective understanding, authenticity and the human person as a subject of consciously developing unity. This is followed by a discussion of two key elements in Lonergan's work that relate to nursing: the subject–object challenge of nursing inquiry and common sense vs. scientific knowledge. The author suggests that integration of nursing theory, (...) science and practice may be achieved through self-transcendence. (shrink)