There are two main things you have to do on curing your heart:

1 - Move your heart from dwelling on the things of this world and move it to dwell on the Hereafter, then focus all your heart on the Quraan and ponder its meanings and why it was revealed.

2 - Try to understand something from every aayah and apply it to the disease of your heart. These aayaat were revealed (to treat) the disease of the heart, so you will be healed, by the permission of Allâh.

—Ibn al-Qayyim [d. 751H/1350CE]