“Fasting is a symbol. Fasting signifies abstinence from lust. Physical fasting is a symbol of that abstinence, and is a reminder; that is, just as a person abstains from physical appetites, he is to abstain from self-appetites and self-desires. But mere abstention from food has no effect on the spirit. It is only a symbol, a reminder. Otherwise it is of no importance. Fasting for this purpose does not mean entire abstinence from food. The golden rule as to food is, do not take too much or too little. Moderation is necessary. There is a sect in India who practice extreme abstinence, and gradually reduce their food until they exist on almost nothing. But their intelligence suffers. A man is not fit to do service for God with brain or body if he is weakened by lack of food. He cannot see clearly.”

-Abdu’l-Baha

(Baha'u'llah and the New Era, p183-185)

“Also in the ‘Questions and Answers’ that form an appendix to the Aqdas, Bahá’u’lláh reveals the following: ‘Verily, I say that God has appointed a Great station for fasting and prayer. But during good health its benefit is evident, and when one is ill, it is not permissible to fulfill them.’”

-       Shoghi Effendi

(Directives from the Guardian, p27-29)

A friend interested in healing quoted the words of Bahá’u’lláh: “If one is sick, let him go to the greatest physician.”

‘Abdu’l-Bahá said: “There is but one power which heals—that is God. The state or condition through which the healing takes place is the confidence of the heart. By some this state is reached through pills, powders, and physicians. By others through hygiene, fasting, and prayer. By others through direct perception.”

“All that we see around us is the work of mind. It is mind in the herb and in the mineral that acts on the human body, and changes its condition.”  

(Abdu'l-Baha in London, p127)