When I said Spiritual revelation is the most certain knowledge, I was speaking of Christian Spiritual revelation. In such revelations, there is no "observer".
The first Spiritual revelation a Christian receives is that "Jesus Christ is Lord". It doesn't come from his own mind, rather the Truth appears in him. But because of the revelation, we believe, He "knows" us and we are born again by and in the Spirit.
We are no longer "observers" - we abide in Him and He in abides in us. (Gospel of John, etc.)
My experience on spiritual revelation is varied.. Sometimes it can be as simple as an intellectual breakthrough or as mind boggling as an epiphany or even a vision.. I see a vision as a vision.. ugh!.. more than mere a clearing of thoughts or the fog that clouds my idea about some thing.. But a "seeing" on a grand scope, a vision of "something" far greater than you were in the market for, since didn't even know that a "sight" like that Could exist..
Amazing (once you get used to it) that a human mind could be transported to another place "not on your own".. "not on purpose". Other than that it could be scary.. I would say revelation is progessive.. Some revelation needs other relevation as foundation.. Because without a proper foundation the revealment of the revelation would not be emergent.. Inspiritation is only revelation if it is spiritual..
Discovery of awareness and what awareness is, might be an epiphany but its not a vision.. as I see it so far.. For awareness is a synonym for gratitude.. Seems like the more aware you are the more gratitude overflows your cup.. The less gratitude you are filled with the more awareness you are in need of.. And where gratitude is King, a loveing faithful sacrificial attitude is Queen..
A revelation of what a proper family is, is indeed a "vision"..