To reconcile the concept of predestination and free will in Islam and deepen their faith, someone should:

1. **Study Islamic teachings**: Read the Qur’an and Hadith on predestination (qadar) and free will to understand the Islamic perspective.
2. **Consult knowledgeable scholars**: Seek guidance from scholars or teachers to clarify doubts and gain deeper insights.
3. **Reflect on the balance**: Understand that while Allah has knowledge of everything, humans are still accountable for their choices.
4. **Strengthen faith through worship**: Engage in prayer, supplication, and other acts of worship to build trust in Allah’s wisdom and plan.
5. **Practice patience and trust**: Trust in Allah’s plan and maintain patience in the face of challenges, believing that everything happens according to divine wisdom.