Know O beloved reader that it is most important to spend ones time and energy in treating the
heart, and hastening to correct and purify it from sickness and all sins. This is due to the heart occupying a great and lofty position in Islam, for it is the place to which the Lord looks and the storehouse for
Tawhid, faith, and sincerity. Actions are distinguished, one from the other, with respect to their excellence in the Sight of Allah in accordance with the condition of the heart, not by their number or form, but rather due to the strength of the caller, his or her truthfulness, his or her sincerity and the extent to which he or she prefers Allahm over himself or herself.
The heart forms the foundation, it is the owner of the limbs, and the limbs are its soldiers, so when the owner becomes purified its soldiers become purified, and when the owner becomes sullied then its soldiers become sullied.
Al-Hafidh ibn Hajr al-Asqalani, said: The heart has been singled out for this because it is the leader of the body, and through the purification of the leader the subjects become purified, and with his corruption they become corrupted.
So if you, O servant of Allah, want to cure your heart then it is upon you to be truthful with regards to seeking refuge with Allah and putting your trust in Him, to pray a great deal of superogatory prayers, to perform the actions of obedience to Allah frequently, to pray the night prayer while the people are sleeping, and to treat your heart by making it continuously stick to the remembrances and by befriending only the righteous... and to frequently recite the Quran. And Allah will indeed allow all of this to be preserved by him.
So my brother Muslim, this is a treatise by Shaykhul-Isla-m Ibn Taymiyyah concerning the topic, Diseases of the Hearts and their Cures. I found it amongst his, Fatawa and saw it to be a beautiful work, containing many benefits. So it is upon you O Muslim to hurry to distribute this amongst your beloved friends and your brothers so that perchance Allah may correct their hearts and Allahs aid is sought.
This is a beautiful book, containing many benefits related to curing the heart from many sickness. It covers a wide range of topics, including ailments of the hearts, envy of the heart, sickness of the hearts, the diseases of desire and passionate love. As well as remedies to cure the heart from the Quran and Sunnah. This work also includes an appendix from Ibn Qayyim al-Jawziyyah on the types of hearts. It is a very beneficial read, for everyone.