While we have invented technological prostheses external ourselves, thanks to the current materialist mentality, Zen Naikan encourages us to become our own internal source of passion, strength, awareness and freedom. The word naikan was used by Master Hakuin Ekaku only three centuries ago to define expressly a method of cultivating energy associated with a new concept of dynamic meditation practice, suited both to laymen leading a life active in society as well as to practicing monks. Zen Naikan brings to those who practice it harmonious well-being, continuous joy, and the most solid aid to healing, encouraging the highest form of spiritual realization. Zen Naikan is a gift of the Rinzai school of Zen Buddhism, from the monks and laymen dedicated to developing spiritual, mental, and physical strength.