Marc Twight said this years ago. I know what he means by it; but I don't think he realizes that it doesn't quite mean what he thinks.
What he meant was, if you blather on and on about how rad you can climb, but then don't follow through with action, well, the talk doesn't mean much, does it?
But let's look at this algebraically. Let's 'solve for Talk' in the lingo.
TALK - ACTION = 0
add action to both sides of the equation:
TALK - ACTION + ACTION = 0 + ACTION
but -ACTION + ACTION cancel each other out. and 0 plu ACTION is just ACTION. So:
TALK = ACTION
That's not what Marc meant to say. Maybe:
TALK < ACTION