O you who believe! Fasting is prescribed to you as it was prescribed to those before you, so that you may learn self-restraint

Anas Radiyallahu 'anhu narrates Nabi Sallallahu 'alaihi wasallam said: Whosoever possesses the following three qualities will have tasted the sweetness of Iman: The one who loves Allah and His Rasul more than anything else; the one who loves a person only for the sake of Allah; and the one who hates to return to Kufr (disbelief) as he hates to be thrown into the Fire. (Bukhari)