The unrestrained glance results in the one who looks becoming attracted to what he sees, and in the imprinting of an image of what he sees in his heart. This can result in several kinds of corruption in the heart of the servant. The following are a number of them.
It has been related that the Prophet, Sallallahu ‘Alayhi Wa Sallam, once said words to the effect:
“The glance is a poisoned arrow of Shaytan. Whoever lowers his gaze for Allah, He will bestow upon him a refreshing sweetness which he will find in his heart on the day that he meets Him.”
[Da’if, at-Tabarani, 8/63; al-Hakim, al-Mustadrak, 4/314; Ahmad, al-Musnad, 5/264]
Shaytan enters with the glance, for he travels with it, faster than the wind blowing through an empty place. He makes what is seen appear more beautiful than it really is, and transforms it into an idol for the heart to worship. Then he promises it false rewards, lights the fire of desires within it, and fuels it with the wood of forbidden actions, which the servant would not have committed had it not been for this distorted image.This distracts the heart and makes it forget its more important concerns. It stands between it and them; and so the heart loses its straight path and falls into the pit of desire and ignorance.
Allah, Mighty and Glorious is He, says:
“And do not obey anyone whose heart We have made forgetful in remembering Us – who follows his own desires, and whose affair has exceeded all bounds.”
(Al-Qur’an18:28)
For more details visit http://islamichub.net/2014/01/poisons-of-the-heart-unrestrained-glances/