Doubt isn’t the opposite of faith; it is an element of faith … Sometimes I think it is my mission to bring faith the the faithless, and doubt to the faithful.*
Paul Tillich

We can grasp the fact that at any moment what seems most certain to us is an illusion. It is an illusion that it preceded a further revelation of ourselves.**
M. C. Richards

Are you sure?

… this is the final and ultimate version of who you can be?
… that you can’t start again?
… you’re unable to forgive someone and move on?
… that you can’t lose weight/get fit?
… you’re unable to complete a project?
… that next time, with the right tweaks, you can make “this” better?
(… whatever it is that you feel so certain about right now)?

I doubt that, and
maybe you should, too.

Doubt is a key to many locked doors.

*Brian McLaren’s Faith After Doubt;
**M. C. Richards’ Centering.