As a result of his war against mankind, to last until the Day of Judgment, Satan will drag myriads of people along with him into the fires of Hell. However, there is one group over which Satan cannot prevail: the believers. The reason being, that believers fear Allah, and are His representatives on Earth and are under His protection. Therefore, the temptations of Satan exercise no effect upon them. This fact, as admitted even by Satan himself, is revealed as follows in the Qur'an:
He [Satan] said, "My Lord, because You misled me, I will make things on the Earth seem good to them and I will mislead them all, every one of them, except Your servants among them who are sincere." (Surat al-Hijr, 39-40)
As can be discerned from this verse, Satan's power is impotent to sway the believers. However, none can regard himself "predestined" for Paradise. In order to protect his faith—for, as outlined in the 28th verse of Surat al-Ma`arij, "no one is safe from the punishment of his Lord"—a believer must continually "hold fast to the rope of Allah" (Surah Al `Imran, 103). Because Satan "will lie in ambush for them on their straight path" (Surat al-A`raf, 16) and "cause them to slip" (Surah Al `Imran, 155), the believer must be always on his guard against his tricks and ploys. Otherwise, he risks falling into his snares, though unaware of it, with the eventuality of falling astray from the true religion. Let us now examine, item by item, the tactics employed by Satan in order to cause people to be destined for Hell.
http://harunyahya.com/en/books/2823/Satan_The_Sworn_Enemy_Of_Mankind/chapter/2087
He [Satan] said, "My Lord, because You misled me, I will make things on the Earth seem good to them and I will mislead them all, every one of them, except Your servants among them who are sincere." (Surat al-Hijr, 39-40)
As can be discerned from this verse, Satan's power is impotent to sway the believers. However, none can regard himself "predestined" for Paradise. In order to protect his faith—for, as outlined in the 28th verse of Surat al-Ma`arij, "no one is safe from the punishment of his Lord"—a believer must continually "hold fast to the rope of Allah" (Surah Al `Imran, 103). Because Satan "will lie in ambush for them on their straight path" (Surat al-A`raf, 16) and "cause them to slip" (Surah Al `Imran, 155), the believer must be always on his guard against his tricks and ploys. Otherwise, he risks falling into his snares, though unaware of it, with the eventuality of falling astray from the true religion. Let us now examine, item by item, the tactics employed by Satan in order to cause people to be destined for Hell.
http://harunyahya.com/en/books/2823/Satan_The_Sworn_Enemy_Of_Mankind/chapter/2087