One of my favorite mantras to repeat in my classes is this:
You are enough; you are more than enough.
It covers everything; the bonus, of course, is that everything about that statement is the absolute truth. Because we *are* enough. We are brewed in a cosmic, chemical, creative soup that has prepared us for the lives we are leading. We have good ideas; we have good instincts.
We only have to realize the truth of that statement, and we'll be just fine.
Because, you know, we were built for this.