The Essence of Islam – Volume II — Page 185
Angles 185. If someone were to ask, why does Satan disobey God when he believes in His existence and Unity? The answer is that his disobedience is not like the disobedience of man; he has been created like that for the trial of man. . This is a mystery the details of which have not been disclosed to man. It is the character of man that mostly he is guided aright by acquiring knowledge about God. Almighty, as He says in the Holy Qur'ān: اِنَّمَا يَخْشَى اللَّهَ مِنْ عِبَادِهِ الْعُلَموا 50 but those who have a satanic character are outside this rule. [Haqiqat-ul-Waḥī, Rūḥānī Khazā'in, vol. 22, p. 122, footnote]. The Highest and Lowest Points of God's Creation. We have already stated that the possessor of extreme perfection whose being is situated at the highest point of the line of creation is the Holy Prophet (peace and blessings of Allāh be on him) and in contrast with him the meanest being who is situated at the extreme lowest point is called Satan. The being of Satan is not apparent and felt, but observing this system of the line of creation, we have to confess that as at the highest point of exaltation is a being who is good personified who appeared in the world as a guide towards good, in contrast there should be at the extreme lowest point a being who incites towards evil and pulls towards it. For this reason in the heart of every person there is found internally the effect of both these beings. The holy effect of Muḥammad, the chosen one (peace and blessings of Allāh be on him) the 50 'Only those of His servants who possess knowledge fear Allāh. 'Fățir, 35:29 [Publisher]