I like what you said but there is an issue:
“No constant something”
“No constant definition”
Those are constant somethings and definitions.
This context _becomes_ the very single context with which all others are to be viewed from.
That doesn’t make it wrong or right – just an easy trap to fall into; that of saying, “all is relative”, except for “all is relative”, which is a fixed certainty.
But outside of that, I like how you think.