How can we understand spiritual truths in the Bible?

The Bible, a spiritual book, necessitates spiritual understanding to grasp its deeper meanings and truths. As stated in John 6:63, the words of Jesus are spirit and life, indicating that they cannot be fully comprehended without the aid of the Holy Spirit. In historic Reformed theology, the illumination by the Holy Spirit is crucial for believers to comprehend the Scriptures and apply them to their lives. Without divine assistance, individuals remain blind to the spiritual realities that the Bible reveals, underscoring the need for God's work in the heart.