Fasting has many benefits according to the document. It helps attain piety and diminishes desires by controlling eating, drinking, and intimacy. It also narrows the passage of devils and strengthens willpower and determination by learning to tolerate hunger, thirst, and abstinence. Fasting breaks routines and helps realize Allah's bounties. It increases honesty and has medical benefits like preventing diseases, relaxing the body, purifying blood, and reducing pressure on organs.