Author Todd Hunter really nails the importance of being in the Scriptures to ensure spiritual growth and faith:
Seeking spirituality without the Bible leaves us like a musician without a score, an actor without a plot or lines of dialogue, like an athlete with no lines on the field to confirm what is in bounds or not. The Scriptures are the primary source material for spiritual formation in the way of Jesus. Our sacred text shows us what such formation looks like and the wider story in which it occurs - for instance, that God is the main character, not us.