Asceticism, from Greek askēsis, exercise or training, is the disciplining of body and mind for spiritual ends. It is found in every contemplative tradition. Its teachers warn against excess as well as laxity, and see it as a means to freedom and love rather than an end.
Asceticism
Spiritual training through self-discipline: fasting, vigils, celibacy and the renunciation of comforts.
Also: askesis