During the so-called "Age of Reason," notables such as Voltaire considered God, at best, to be a God detached from intimate concern over His creation. American counterparts during this time included Benjamin Franklin, Thomas Paine, and Thomas Jefferson. Their human intellect reasoned if there truly was a God, then why did He not intervene more demonstrably in the cause of mankind?
What they failed to "reason" was how God's nature is always to intervene on behalf of those who seek and wait for Him. It was His nature to intervene by sending His Son on our behalf. Why would He not likewise intercede for us in every detail of our lives if it is clearly in His nature to move heaven and earth on our behalf? This, my friends, is only reasonable.