Personal mastery is the discipline of continually clarifying and deepening our personal vision, focusing our energies, developing patience, and seeing reality objectively. As such, it is an essential cornerstone of the learning organization—the learning organization’s spiritual foundation. An organization’s commitment to and capacity for learning can be no greater than that of its members. The roots of this discipline lie in both Eastern and Western spiritual traditions, and in secular traditions as well.

— The Fifth Discipline: The Art & Practice of The Learning Organization by Peter M. Senge