Pope Benedict on ‘doubting Thomases:

"... people must find "the courage to say, 'I don't understand you, Lord. Listen to me. Help me understand.'
Christians have 'the right, so to speak, to ask Jesus for an explanation,' the pope said, and asking for further clarification 'is the true way to pray and speak with Jesus.'
Not only does this show that believers realize their own limited ability to understand God's greater plan, but it also demonstrates their faith in receiving 'enlightenment and strength' from God who can grant them, he said.