apex said:Which ancient Greek philosopher stated "you never step in the same river twice"?
Is this a quiz, or do you seriously not know? I'll give you a hint: name starts with "H", home city with "E" ...
Still, the reference to Heraclitus doesn't vindicate your new age platitude. Of course knowledge and understanding are variable; of course circumstances change. But you still have no clear idea what the hell you mean by "knowledge" and "understanding".
To understand is to take in information, and to explain is to dispense information.
Ah, so simply taking in information suffices for understanding, and spitting it out for explanation? My computer is doing that over the network right now; does it understand when it takes in data, and explain when it sends it out?
Here, let's substitute your definitions into a sentence that captures how we commonly use these terms ...
"I read her confession and understand her motives, but her subsequent choices make no sense; I cannot explain them."
... this becomes, on your definitions ...
"I read her confession and take in information about her motives, but her subsequent choices make no sense; I cannot dispense information about them."
... would you say meaning is preserved here?
And you still haven't explained your definition of knowledge as "identifying/understanding/analyzing reality" -- what do these slashes mean?