“O you who believe! Observing the fasting is prescribed for you as it was prescribed for those before you, that you may become Al-Muttaqun (those who have Taqwa).” [AlBaqarah:183]
Observing fasting (i.e. regular fasting) = Increasing your consciousness of Allah (i.e. can’t say this, can’t do that) = Increasing your Taqwa of Allah!