I'm just thinking back to one of Skeezyks' posts above, "wholeness does not mean perfection." I don't think trust means that you think the other person is going to be perfect, either. I'm not very trusting, but I'm open to uncertainty, and other people and their points of view always bring uncertainty. But only in uncertainty can we find new things. I can trust that and take those risks of discomfort. It doesn't cross into unsafety, so to speak.

Disclaimer: while I've looked at the site linked above and read all the posts, I haven't studied the book, yet.