How can one achieve true faith in God and live like everyone else, given these problems related to doubt, the sickness of the heart mentioned in the Quran, repeatedly abandoning prayer, in addition to the family suffering from sorcery?

Belief in God is a fundamental pillar of faith, without which righteous deeds cannot stand. It is necessary to distinguish between doubt in God's existence and intrusive thoughts (waswasah), as the latter does not imply a lack of faith. Doubting the Creator's existence is like doubting the sunrise. How can a rational person doubt the existence of their Creator when the entire universe, with its proofs and order, and humanity itself, with the wonders of its creation, bear witness to His existence? Allah Almighty says: "And in yourselves. Then will you not see?" (Qur’an 51:21). It is intellectually known that every created thing must have a creator; it is impossible for a thing to create itself or to exist without an originator. Allah Almighty says: "Were they created by nothing, or were they themselves the creators? Or did they create the heavens and the earth? Rather, they are not certain." (Qur’an 52:35-36). The messengers indeed said to their nations: "Is there any doubt concerning Allah, Creator of the heavens and the earth?" (Qur’an 14:10).