Emmy (collaborator extrordanaire) and I had a moment today of stopping, sweating, and saying "This is hard. What we are trying to do here is hard. We're hardly inventing the wheel, but there aren't a lot of blueprints for the work we're trying to do, and that makes it extra hard to get it done and feel confident in the progress.
I imagine that many artists, no matter what they're trying to accomplish, have these moments of self doubt. It is our nature to be in constant states of existential crisis I think. I do, however, wish that we could find ways to nurture ourselves through this part of the work.
Our best approach is to push on, try our best, and make sure to take a dip in the river after a long rehearsal day in 95 degree weather.