Doubt stokes our internal wonderment, a desire for learning and growth - leading to change and development. The absent of doubt, leads to a feeling of superiority - a form of unteachable pride. Jesus teaches us to guard against this, we are to be humble and I think our humbleness helps to ensure we remain teachable. This humbleness enables us to be free to question our assumptions and is an antidote for our prejudices and predispositions.
Elton Trueblood said, "Faith is not belief without proof, but trust with reservations." I have faith because I see the proof of God's love towards his creation all around us, as Saint Paul states in Romans 1:20; "for since the creation of the world God's invisible qualities-his eternal power and divine nature-have been clearly seen, being understood from what has been made."
Faith coupled with doubt enables us to explore all of God's created world and continually realign ourselves with the story of the kingdom of God on earth. We can refuse to settle into the pattern of a hedgehog thinker as explained in Philip Tetlock's, Expert Political Judgment:
Enabled by faith, our freedom to doubt lets us take advantage of what Tetlock calls fox like thinking;