In The Name of Allaah, The Most Merciful, The Bestower of Mercy.
Imaam Ibnul Qayyim [rahimahullaah] said:
Keep away from the one who shows enmity to the people of the Qur’aan and the [authentic] Sunnah lest you are afflicted by his loss [or depravity]. Beware of two enemies through whom many people were destroyed: The one who was hindered from the Path of Allaah due to his doubts and adorned speech; fascination with his worldly possessions and leadership. Whoever is given strength and facilitated [with the means] to something, his pleasure will be found in utilising that strength [in that affair]. Whoever is granted the strength to have sexual relations, he will find pleasure in utilising his strength in it. Whoever is given strength to become angry and overcome [others], he will utilise the strength of his anger to [obtain what he desires]. Whoever is given the strength to eat and drink, his pleasure will be found in utilising his strength in [eating and drinking]. Whoever is given the strength to [obtain] knowledge and understanding, his pleasure will be found in utilising his strength and directing it towards [obtaining] knowledge. Whoever is given strength in [having] love for Allaah, turning to Allaah in repentance, submission and obedience, being devoted to Allaah [sincerely with one’s] heart, having an ardent desire [to please, obey and meet Allaah] and [desiring to come close to Allaah, be recognised and loved by Allaah etc], he will find his pleasure and bliss in utilising this strength in that. All these pleasures will dwindle and disappear, except this one [i.e. love of Allaah etc]. [Al-Fawaa’id 121-122. Slightly paraphrased]