Sarah Laughed

In the CLM class I taught last night, the person who shared a devotional read Genesis 18:1-15. He compared the trust in God's word exhibited by Abraham to Sarah laughing, saying that she was laughing because she didn't trust or believe God would do what God had promised.

How do you view the idea that Sarah laughed?  Is it distrust? Or is it something else?

For me, I've always loved that Sarah laughed. I imagine, if I live to be as old as Sarah was, and God said to me that I would have a child, I would laugh.  Or cry. It's ridiculous. It's laughable. It's unbelievable. And maybe, for Sarah, who had no children, it would be joyous, too, 

I don't think she is a model of distrust we should avoid emulating.  I think she is a slice of humanity.  Disbelieving. Smart enough to know what she's been told is impossible. Afraid, and a little bit joyous, too. And God respected her enough to have a conversation with her.