Voluntary fasts, also known as spiritual fasts or religious fasts, are a common practice in many cultures. These fasts are usually done as a form of self-discipline or in honor of a religious observance. Synonyms for voluntary fasts include asceticism, abstinence, abstention, fasting, mortification, and self-denial. Asceticism refers to the practice of self-discipline and austerity as a means of achieving spiritual growth. Abstinence and abstention both refer to the act of refraining from food or other indulgences for a period of time. Fasting, mortification, and self-denial all refer to the practice of voluntarily abstaining from food or other pleasures in order to gain a spiritual benefit.