شَهْرُ رَمَضَانَ الَّذِي أُنزِلَ فِيهِ الْقُرْآنُ هُدًى لِّلنَّاسِ وَبَيِّنَاتٍ مِّنَ الْهُدَىٰ وَالْفُرْقَانِ ...

Fasting serves as training for two things at the same time—inculcating the spirit of thanksgiving and instilling the fear of God in the heart of the believer. Food and water are great blessings of God, yet man is incapable of attaching due importance to them. While fasting, he goes hungry and thirsty the whole day, then at sunset, in a state of extreme hunger and thirst, he eats and drinks to his fill. He then realizes through his own experience how great are the blessings of God which are present in the form of food and water. This experience produces boundless feelings of gratitude towards his Lord. On the other hand, fasting also serves as a form of training for a God-fearing life, which entails abstaining from all kinds of sins and evil deeds, which God has forbidden. A total abstention from food and drink from dawn until sunset is an exercise in making God one’s guardian. The entire life of the believer is a life of fasting. During the month of Ramadan he receives his training by temporarily, abstaining from certain things, so that for the rest of his life he may permanently renounce all those things of which God disapproves. The Quran is a great blessing of God to man. It is through fasting that man enables himself to be truly thankful to God, and to lead a godly life in accordance with the teachings enshrined in the Quran.

— Source: Tazkirul Quran (Maulana Wahiduddin Khan) via Quran.com (2:185)