Indeed, the fast is only virtuous due to two significant concepts. Firstly, it is a secret and hidden action thus, no one from the creation is able to see it. Therefore showing off cannot enter into it. Secondly, it is a means of subjugating the enemies of Allah.
This is because the road that the enemies (of Allah) embark upon (in order to misguide the Son of Adam) is that of desires..
Know that in the fast is a special quality that is not found in anything else. And that is its close connection to Allah, such that He says: “The fast (Sawm) is for Me and I will reward it.” [al-Bukhari and Muslim]
«الصوم لي وأنا أجزي به» رواه البخاري ومسلم
This connection is enough to show the high status of fasting. Similarly, the Ka`bah is highly dignified due to its close connection to Him, as occurs in His statement, “And sanctify My House.” [al-Hajj 22:26]
{وَطَهِّرْ بَيْتِيَ} الحج: 26
Transliteration: watahhir baytiya