Abu Malik Ashari relates that the Messenger of Allah ﷺ said: “Cleanliness is half of faith and al-HamduLillah (Praise be to Allah) fills the scale, and Subhan Allah (Glory be to Allah) and al-HamduLillah(Praise be to Allah) fill up what is between the heavens and the earth, and prayer is a light, and charity is proof (of one’s faith) and endurance is a brightness and the Holy Qur’an is a proof on your behalf or against you. All men go out early in the morning and sell themselves, thereby setting themselves free or destroying themselves.”
(Sahih Muslim)
Faith covers two aspects: (a) purification of one’s soul from all evil thoughts and ideas and banishing from it the love of all false deities; (b) entertaining in one’s heart the love of Allah alone.
Cleanliness is half of faith because one cannot have full devotion to Allah unless the purification of heart is complete. Thus half of faith is purification of the soul and the rest half is devotion to Allah to the exclusion of devotion to any other deity.
Adoration of Allah is the sum and substance of faith and the real basis of piety and God-consciousness; it is, therefore, weighty enough to fill the scale of his destiny with virtuous deeds and secure salvation for him.
The whole universe provides a living testimony to the Glory of the Lord right from the insignificant to the huge and massive animals, and from the tiny atom to the mighty constellations gliding in the heavens.