To see what I appear to be, in my immediate experience, I have to look as if for the first time. I have to let go of memories, ideas, expectations. And it is always fresh, always different, always new.
As one of my Zen teachers said when I struggled with my first koan: How would a five year old answer it? Allow any sophistication to drop, and just say and act from your immediate naive experience.
The experience of Big Mind is nothing new. It is what we all (?) experience now and then. Moments of no particular identity, of becoming whatever arises. There is nothing particularly esoteric or mystical about it.
To enter Heaven, we must become like children – with naive seeing.