In a Hadith, the Prophet of Islam has said: “Every deed in Islam is rewarded from ten to seven hundred times. But God says, ‘Fasting is for me, and I will give unlimited reward to one who fasts.’” (Sahih Muslim, Hadith No. 1151) The question is: what is the importance of fasting such that one who fasts shall be given unlimited reward? The above Hadith gives the reason. It says that one who fasts gives up food and water for the sake of God. Here, ‘for the sake of God’ is not an ambiguous phrase. It means that a person who fasts, prepares himself for the mission of God. Due to this high purpose, he will be given the highest reward. In the month of Ramadan, it is required that every believer must go through the Quran and find out the message of the Quran and adopt the spreading of this message as his mission. So, every year, one month is meant for preparation and eleven months for spreading the message of the Quran to all mankind. Spreading the message of the Quran is a divine mission. According to the Quran, it is akin to providing support to God. Due to this speciality, the Prophet of Islam informed that fasting is preparing oneself for the sake of the divine mission. This is the greatest mission, so one who devotes himself for it is liable for the greatest reward.