He has a face more bright than a mirror but he has a black heart. In addition he has a pleasing glib tongue, but he maintains a very sinful mind. On that account the wretch can not get close to union with Allah.
‘And there is the one amongst people whose discourse on the life of this world you admire, and he cites Allah as witness concerning what is in his heart. Yet he is the most contentious of adversaries sufficient for him is Hell. (204, Al-Baqarah).
Note: (1) In the above Quranic verse reference is to a notorious hypocrite named Akhnas, who had a very glib and fluent tongue and deceiving manners.
(2) In the above verses reference has been made to a tarnished and ‘black’ heart and the desirability of keeping it clean. In this connection, the following brief note, based on lmam Ghazali’s “Tabaligh-i-din”, may be useful.
The heart, as a sovereign, commands services of all limbs of the human body. But they too, in their turn, influence its healthiness and sublimity by their actions. It is, therefore, essential that they should work on correct lines and be obedient to the heart.
The heart is like a mirror and like the latter it should be kept clean and polished. It is only in that condition that it may be favoured with the Divine light or manifestation. To achieve and maintain its purity the following steps seem necessary:
a) All unwholesome desires should be purged from the heart to maintain its intrinsic cleanliness;
b) Allah should always be remembered and feared in order to retain the heart’s receptivity; and
c) The bodily limbs should be controlled and made to function in obedience to the heart, so that its potentiality may not be impaired.

Your face is brighter than the mirror, you heart is black,
Your speech is soft and sweet, but you are cruel and heartless,
Such a one is far from union with the loved one.