Re: Relate to your mind as a clear spacious sky and to the thoughts as clouds.
Well I'll just say that in my opinion that all leads knowhere and is full of double talk and nonsense. When we see what mushin is then we can see clearing, changing thoughts, removing etc. cannot be done without it. Nor can any observational or self observational practice.
Very simple really......If you are not using mushin then you cannot 'see' anything clearly or observe anything clearly.
I'll repeat what I've said before many times, it's never a matter of not using any of these things it's a matter of learning when you do for you cannot escape the truth.