I have noticed that a lot of things in Aikido require literally, faith - in a way, like Indiana Jones stepped into that canyon in the third movie.
I remember that I did my first roll out of faith.
I had do have faith in the fact that my arm will not collapse.
When I gathered enough, I did a roll and it worked.
Of course there were many times when it didn't and I let it collapse because I was afraid and lacking... faith.
Then I hurt my back, shoulders, etc.
kokyu dosa appears to be something also requiring faith. I noticed that the power of your center really kicks in during the middle of the technique, but that first part has to be more or less based on faith, for an amateur like myself.
And now when I'm learning breakfalls, it also requires faith...
I can prove to you that a person can highfall in exactly the time it takes me to hit the ground. I can replicate that process with you. It does require faith but it ain't the same thing.