There is a piece of flesh in the body, if it becomes good the whole body becomes good but if it gets spoilt the whole body gets spoilt and that is the heart [Hadith, Sahih al-Bukhari]. Physically, the heart nourishes the body, while spiritually, it leads us to Allah SWT. However, the heart is also vulnerable to the influence of shaitaan and requires constant protection and cleansing. "Qalb" means "to turn," describing how the heart continually changes in different states. To safeguard the well-being of your heart, one must prioritize regular self-reflection and purification.