Why is it important for Christians to rely on the Holy Spirit?

In Joel 2:23, the Holy Spirit is referred to as the rain that God promises to provide to His people. By sending His Spirit, God confirms the believer's inheritance, ensuring that they are never left to navigate their struggles alone. The Holy Spirit grants wisdom, encouragement, and conviction, sealing the believer's relationship with Christ. This divine assistance is crucial for sustaining faith amid adversity, as it reassures believers of their identity and position as children of God.