In The Name of Allaah, The Most Merciful, The Messenger of Mercy
Imaam Ibnul Jawzi [rahimahullaah] said:
Know that the Prophets came with enough clarification, tackled the diseases with a sufficient remedy, agreed upon a methodology and did not differ; but the devil came along and mixed the clarification with affairs that resemble the truth but are falsehood in reality; mixed the remedy with poison and the clear path with misguided divergent paths. He has not ceased playing with the intellects until he divided ignorance into various absurd paths and repugnant innovations, so the people began to worship idols in the sacred house, made it unlawful for a Saa’ibah [a she-camel let loose for free pasture for their false gods] to carry anything, and that the milk of the Baheerah [a she-camel whose milk was spared for the idols] was not allowed for anyone to drink, as well as the Waseelah [a she-camel set free for idols because it has given birth to a she-camel at its first delivery and then again gives birth to a she-camel at its second delivery] or a Haam [a stallion-camel freed from work for their idols, after it had finished a number of copulations assigned for it]. They buried daughters alive, prevented them from inheritance and [committed] other misguided affairs which Iblees beguiled them into. Then Allaah sent Muhammad [sallal laahu alayhi wasallam], so he removed all repugnant things and legislated affairs of welfare and wellbeing. His companions traversed upon his guidance with him and after his departure from this world- safe from the enemy Iblees and his deception.
When the presence of their guidance departed, the mists of darkness approached and thus evil desires returned to establish innovations in religion and diverted the path from sound Eemaan, which had always been established on sound Eemaan, and thus many split up their religion [i.e. who left the true path] and became sects [i.e. they invented new things in the religion], so Iblees rose and confounded people, beautified [misguidance], cause splits and gathered [his allies]; but he was only capable of doing so by creeping into the night [or darkness] of ignorance, because he would have been exposed if the dawn of sound knowledge rose upon him. Therefore, I determined to warn against his plots and show his traps, for indeed knowing evil is a warning against falling into it. In the Saheehayn [Bukhaari and Muslim] Hudhaifah [radiyallaahu] said: “The people used to ask Allaah’s Messenger [sallal laahu alayhi wasallam] about the good times, but I used to ask him about the bad times fearing lest they overtake me”. 
Ikrimah [radiyallaahu-anhu] said that Ibn Abbaas [radiyallaahu-anhumaa] said: “By Allaah I don’t think there is anyone on the face of the earth at present whom shaytaan wishes for his death more than me; so it was said, ‘Why?’ He said, ‘By Allaah he initiates an innovation in the religion in the east or the west, so a man informs me of it and when it reaches me, I repel it with the Sunnah; so the innovation returns to him just as he initiated it’”.
Indeed, I write this book to warn against his affliction and make the people fear his trial, unveil his hidden plots and make his affair manifest while he is disguised in his deception. And Allaah gives support by way of His Generosity to everyone who is truthful in his goal. I divided it [i.e. this book] into thirteen chapters to expose Iblee’s deception and so that the smart one understands his deception by way of it. [An Excerpt from Talbees Iblees. pages 7-8. With the checking of Shaikh Zayd Bin Haadee [rahimahullaah]. Slightly paraphrased]