There’s often doubt.  Giving someone the benefit of that doubt enables us to move forward, and that requires us to realise that our doubt might be unfounded.  Systems that assume goodwill create possibility, connection and utility far easier than those that don’t.*
Seth Godin

Doubt is more often experienced
at the beginning of something
rather than the end; certainty can be
way more troublesome.

*Seth Godin’s blog: Assume goodwill.