Sincerity

All perfect praise is due to Allaah Who commanded us to be sincere and promised those who adhere to His commands and refrain from His prohibitions to be saved (in the Hereafter). May Allaah exalt the mention of the one who commanded his Companions and followers to always safeguard their hearts and fulfill sincerity in intentions, perhaps by doing so they would save themselves from the terrifying events on the Day of Resurrection. To proceed : Muslim scholars have paid great attention to the deeds of the heart, authored many books on this topic, explained the importance of this issue to people and encouraged them to be mindful of it and develop themselves in this field. This is because the salvation of humankind (after the mercy of Allaah) is achieved through having a sound and sincere heart. The deeds of the heart require greater care and struggle than the deeds of the limbs and the tongue, and if the heart is reformed, rectified and is treated for its illnesses and defects, then the actions and deeds of the limbs will be done purely for the sake of Allaah. Therefore, the main and most essential matter is to reform and remedy the actions of the heart, because without a sound heart there would be no benefit from the actions of the limbs. 3 Sincerity Sincerity is the most essential action of the heart and the foundation of all deeds. It is the essence of the religion and the main element to which the Messengers of Allaah, may Allaah exalt their mention, called. Allaah The Almighty Says (what means):  "And they were not commanded except to worship Allaah, [being] sincere to Him in religion, inclining to truth, and to establish prayer and to give Zakaah. And that is the correct religion." [QUR'AAN 98:5]  "Unquestionably, for Allaah is the pure religion [i.e. worship is done sincerely to Allaah]." [QUR'AAN 39:3] Sincerity is the spirit and essence of all acts of worship and based on it deeds are accepted or rejected. For all these reasons, we decided to present this book on the definition of sincerity and other matters related to it. We ask Allaah to accept our efforts and reward us for it and make our intentions sincere for his sake.