Christians, at some point in life, will stop and wonder whether or not they believe enough or have faith strong enough. What brings this on?

Life just hurts. Have you been in a place when you could swear there was a steady beeping sound just before a load of grief or stress was dumped on your head? During these times, we are prone to wonder where we had fallen short of God's expectations, searching high and low for to uncover the area of life that still is not sufficiently yielded.