By fasting, a Muslim may learn self-restraint and cherish his power of decision and determination, and he may also moderate his passions and caprices. The instinct for food, drink, and sex, are strong in the animal nature, and temporary restraints from all these enables him who fasts to direct his attention to higher things and spiritual affairs. As a matter of fact, the greatest advantage of fasting lays in its spiritual and moral effects. It serves to promote man from the level of humanity up to the rank of angels. As our prophet (AS) has said: ``Fasting is a shield against the blazing fire of Hell.'' The prophet has also said that there is a certain gate in the Paradise, named the door of RAYAN, and it will only opened to those who perform the fast commandment.