Not sure if this is what you're looking for, but it's what sprang to mind...

After abstaining from magic mushrooms for 2 years, fasting for 24 hours, then mid day, on that empty stomach, consuming uncounted tens of grams of dried, freshly fine-powdered, very strong northern psilocybe semilanceata, hot, in just lemon juice, and chugging that pint of thick mushroom super-lemony brew down as fast as I could. It started coming on FAST and STRONG. I ran the 3 strides to the bathroom sink with need to purge, which didn't last long nor purge much of it... clinging to the sink as I slumped down, with the trip immensity roaring at the doors bursting in at all the seams, I tried to steady myself, I meditatively focused on a drop of water, empathising with it likewise clinging to the underside of the sink. I empathised my way instantly to know where every molecule, and every atom, of the water in there, had ever been, and it was a short jump from there to realise I could do that with everything, ... and this was only in the beginning seconds of the hours long trip, the ability to see behind things, to know from every perspective, everybody, all time, all times, all dimensions all places... I cant speak to it really, only to say I remember I did experience it. Can't take it all back with you.

First exchange with other people after I came out of the toilet, friends had come around, one asked "how was it?", and with it all still being fresh, the immensity of having experienced omniscience, sought to offer what I thought was the most beautiful thing of it all... I said, with all glowing reverie "I know death". The look of horror on the poor dear's face though. Ho ho ho.

But yeah, get that... we mere mortals, many, all around, can experience omniscience.

And many are [and ever have].

Say hi.