Book 2: The Book of Purification (Kitab Al-Taharah)
We have read in the first Book that the love of Allah is the highest aim of a true believer. It is for the achievement of this single end that he affirms his faith in Him by renouncing all other types of godhood.
The love of God is not something inert or lifeless; it is dynamic in the sense that it calls for a complete change in the life of man: change in his thoughts and ideas and change in his conduct and behaviour. One who claims to be a believer in Allah has to make a good deal of effort with a view to pleasing his: lord. He has to purify his soul from all evil thoughts and fancies so that the love of God should reside in it. Unless the soul is purged of all impurities one cannot achieve salvation. This is known as Tahdrah in Islam, and it is the foundation-stone of Imin. This high objective of the purification of the soul requires intentional and deliberate efforts and a good deal of sacrifice on the part of man, and the most elementary stage in this sacred path is the cleanliness of body.
By enjoining cleanliness of body upon man Islam awakens him to the realisation of the fact that when impurities on the body of a man produce such unhealtby effects on his physical being and corrode his mental health, how miserable his life would be when his soul is polluted with impurities. The process of the purification of the soul should, therefore, start with the purification of the body.