One of my favorite acorn-related sayings:
'Remember, an oak tree is just a nut that held its ground!'
When people think you're a little 'off your rocker' for whatever reason, just keep that in mind. It may help. :)
I never heard it either, but I really like it. I will keep that in mind when I know I am right (which is always) and somebody is telling me I am wrong ( I don't understand why anyone ever would though)!