If we had to understand how the foot worked before we could walk, we never would. I doubt many of us really understand how our bodies function, how electricity happens or how the internal combustion engine powers a car. That doesn't stop us from eating, turning on the lights or driving to work each day. We are confident in things that are familiar. I think faith is something like that too. We may not understand how God made it all happen or why He cared so much for us that He sent His Son to rescue us. But when we have experienced that divine rescue on a personal level and have learned to lean against Him, only to find Him leaning back...we are reminded that the most important kind of knowledge is the kind that starts with Him knowing us!
Galatians 4:9 But now after you have known God, or rather are known by God, how is it that you turn again to the weak and beggarly elements, to which you desire again to be in bondage?