While visiting the Tower of London, I noticed that on top of the turrets in the White Tower, there were weather vanes that beautifully decorated the corners of the building. A weather vane is an instrument that shows the direction of the wind.
Just as a weather vane shows the direction of the wind, the God inspired word of God, the Bible, shows the direction that the Holy Spirit wants our lives to follow.
Psalm 119:105 (KJV)
105 Thy word is a lamp unto my feet, and a light unto my path.