The Holy Quraan says:
[002.183] "O you who believe! Observing fasting is prescribed for you as it was prescribed for those before you, that you may become pious."
[002.185] "The month of Ramadan in which was revealed the Qur'ân, a guidance for mankind and clear proofs for the guidance and the Criterion (between right and wrong). So, whoever of you sights (the crescent on the first night of) the month (of Ramadan), he must observe fasts that month, and whoever is ill or on a journey, the same number [of days which one did not observe (fasts) must be made up] from other days..."
AND also:
Muslims fast in Ramdan because Allah wants us to feel how poor people feel, when they dont have food for the whole day. There many other reasons, including that it helps us become a great Muslim. I think Muslims realize the importance of food and water, and everything that is provided by Allah.
