The first thing that zoomed into my head when I read the prompt was recollections of the people who've irritated the life out of me by their lack of letting their left hand know what their right hand was doing!
Yes ... I know another adage, I love an adage or two, don't know why ... easy ... I thought, everyone knows those quirky people ... you know the ones, unco-ordinated, can't get their act together ???
The ones that only tell you half the story, usually aren't organised, frequently haven't heard the whole story and mess up a task or plans ... well that's what I thought when I started this ... but curiosity led me to Google and here's the origin ...
The left hand doesn't know what the right hand is doing
One's varied interests are kept separate.
This originates from the Bible, Matthew 6:3 (King James Version)
But when thou doest alms, let not thy left hand know what thy right hand doeth.
That meaning alluded to the wisdom of not giving oneself credit for providing charity to others - just give and forget about it. That view was reiterated by Henry Thoreau in his Walden; or life in the woods, 1854:"If you should ever be betrayed into any of these philanthropies, do not let your left hand know what your right hand does, for it is not worth knowing." The original meaning of the phrase is now lost. We presently use the phrase to suggest that, in business, one should keep one's interests independent of each other.
SOoooooo ... that's blown that theory out the window ... NEXT!