[MM Makarim Al-Akhlaq / مكارم الأخلاق

Hypocrisy is a deep-rooted and all-pervading spiritual disease. A person’s heart could be overflowing with it yet be oblivious of it due to its hidden and subtle nature; frequently does it lead a person to think they are acting rightly when in reality he is spreading corruption. It is of two types: major and minor; majority hypocrisy leads to eternal punishment in the lowest depths of Hell; it is to outwardly display faith in Allah, His Angles, His Books, His Messengers, and the last Day whereas inwardly one is devoid of such belief, indeed disbelieving in it. They do not believe that Allah spoke to a man amongst men who He appointed to be Messenger: guiding them by His permission and warning them of His punishments.