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I agree that 'there is none righteous, no, not one.
I agree that 'all knowledge' would be very hazardous and difficult for mortals to bear.
I do not believe that mortals COULD contain 'all knowledge.'
And, the Bible indicates no mortal will be wiser than Solomon.
So, "all" knowledge is not an option for mortals.
There have been humble Bible Greats--Moses etc. Isaiah? Jeremiah? Paul? I've known some in my more spiritual circles. No amount of knowledge would have made them proud. They would have been humbled to have to bear the burden of it.
Mostly I agree with you. I just can't black-wash 100% of all believers with that broad brush.
Pride only one failing. Solomon wisest man ever failed in his wisdom. People are what they are.