Our life in Christ can be compared to an aqueduct, the stone waterways that brought water from nearby mountains into parched cities in Italy and Spain, and that are still used in some countries today. The objective foundation of our spiritual lives, the Word of God, is like the huge stone aqueduct itself. The subjective elements, our daily experience of Christ, is like the fresh water flowing through it.
Some Christians neglect the Word and seek only the subjective experience. But without the solid Word of God to contain and channel that experience, the experience itself drains away into error and is lost.
Other Christians boast well-engineered aqueducts based on extensive knowledge of the Bible, but they are bone dry. They bring no refreshment. Strong spiritual lives require both a strong knowledge of the Word of God and an intimate daily relationship with Christ.