This was in my devotional a couple of days ago — so well put (of course; leave it to Mr. Keller.)
“Lord, you hide yourself in history, but you don’t hide yourself in your Word.”
In other words, experience does not need to dictate my theology; the Word of God needs to shape my expectation and hope.
When asking what the will of God is, or how to pray, I need not look at history or my experience, but instead, look at the Word. There I find a rock that will settle my feet quite firmly in the truth of His unfailing goodness, His unflagging power, and His boundless compassion. Hope, pray, expect in the light of that abundantly clear revelation.