All Societies, from the most primitive to the most advanced, have found fasting useful for one reason or another. The people of the Book - Jews, Christians and Muslims have emphasized fasting during certain periods seeking atonement or penance and expressing feelings of mourning or festivity. Even other religious people of Jains, Buddhists, and Hindus have practised fasting for their spiritual growth, salvation or atonement. >Non-religious advanced people of high-tech cultures have also found this institution useful for dietary and political purposes. >Apart from the above, Muslim tradition also tells us that all prophets - Adam, Noah, Abraham, Moses, Jesus and Muhammad (P) have had this institution of fasting. >The author suggests that instead of making this world a hot bed of confrontation, we need to realise that the Source of Guidance for Jews, Christians and Muslims has been the same: the more we deviate from the Source, the more problems we would have at our hands. >Further, with his deep knowledge on fasting the author describe in detail the excellent qualities of fasting and the success achieved and enjoyed by the religious people on account of it.