Remember with all your heart that just as the Black Stone is placed in the House of Allah, so too does the breast of man house the heart. The House of Allah passed through a time when the disbelievers had it stocked with idols. It was possible that the House of Allah should not have undergone such a period in time, but no, Allah desired for this situation to act as a similitude. The human heart is also like the Black Stone and his breast is similar to the House of Allah. Thoughts of all that is other than Allah are the idols that find a place in this Ka‘bah, as it were. The idols of Mecca, the Honoured City, were destroyed when our Noble Prophet, peace and blessings of Allah be upon him, entered it victoriously with a community of 10,000 saints. These 10,000 companions have been referred to as angels in past scriptures and in reality their glory was comparable to angels.
Human faculties are also in a way similar to the angels, for just as the angels are distinguished in that: یَفْعَلُوْنَ مَا یُؤْمَرُوْنَ i.e. they do as they are commanded) in the same manner human faculties are characterised by the fact that they do as they are commanded. In the same manner, all human faculties and organs are subjected to man’s command.
Therefore, in order to overthrow and dislodge the idols of all that is other than Allah, an onslaught must be waged against them as well. The host that is required for this is prepared through inner-purification and only such a one who engages in this cleansing process is granted victory. As such, it has been stated in the Holy Quran:
قَدْ اَفْلَحَ مَنْ زَکّٰھَا
‘‘He indeed truly prospers who purifies the soul.” It is recorded in a hadith that if the heart is reformed, the entire body is set right and repaired. Indeed, how true it is that the eyes, ears, hands, feet, tongue, etc., in fact, all the limbs, actually follow the ruling of the heart. A thought arises and the concerned limb becomes ready at once to follow its command.
(Hazrat Mirza Ghulam Ahmadas, Malfuzat, Vol. 1, pp. 194-195)
