On that day [the resurrection], neither wealth nor offspring will be useful, only he who comes to Allah with a pure heart (the holy Quran) will be saved.

The heart can be affected, and its damage worsens without us realizing it. He can even die without anyone knowing it. A sick heart consists of the fact that its bearer does not react to the wounds of disobedience and does not feel the devastating effect of his ignorance of the truth. This work is perhaps an initiation or an introduction for novices to certain fundamental elements of spiritual life in Islam.