When the Angel came to Mary and said she was going to be the mother of Jesus; conceived of the Holy Spirit, her response was of being troubled at what the angel had said.
Some people think we are called to a blind faith in Christ; but we are called to ‘come and reason with me’; Mary responds thoughtfully when the angel speaks; she is not naive to what is happening.
Mary was troubled and was pondering it all in her mind; and is trying to weigh it all up to understand it. She is showing that her faith is a whole of person response including her intellect. What is the difference between Zacharius response to the angel (who was struck dumb), and Mary’s response who still thought about these things who was open to the truth, and willing to submit to this truth even if it meant being uncomfortable.
There is the kind of doubt that comes from a closed mind, and the kind of doubt that comes from an open mind.
What sort of doubt do we have? Are we like Mary and wanting to be humble servants of God, even though we may not fully understand the circumstances?