Some time ago, I came across a quote from C.S. Lewis, in Mere Christianity, which has thrown out a challenge to me in how I live my life.
Imagine yourself as a living house. God comes in to rebuild that house. At first, perhaps, you can understand what He is doing. He is getting the drains right and stopping the leaks in the roof and so on: you knew that those jobs needed doing and so you are not surprised. But presently He starts knocking the house about in a way that hurts abominably and does not seem to make sense. What on earth is He up to? The explanation is that He is building quite a different house from the one you thought of--throwing out a new wing here, putting on an extra floor there, running up towers, making courtyards. You thought you were going to be made into a decent little cottage but He is building a palace. He intends to come and live in it Himself.
This quote highlights unpleasant things we can experience, and helps us to realize that God can transform us into palatial dwellings if we allow him to go to work in us. He wants our Fiat, just as he wanted Mary's yes to bearing the Savior, because he has a plan for each of us to bring Christ more fully into the world. As I heard at Mass today on the Solemnity of the Annunciation, Mary said yes even though becoming pregnant might have led to her being stoned for apparent adultery. She said yes even though she could see only one step ahead. And each of us is called to say yes when the path is shrouded in mist and darkness and only the light of Faith leads us on.