Kann nicht / Cannot Regieren / Govern Sie / You
You can do what you think you can do and you cannot do what you think you cannot.
You cannot cover a ruin with a page of 'Pravda.'
Do not let what you cannot do interfere with what you can do.
One cannot govern with 'buts'.
You cannot win if you cannot run.
You cannot play naive if you're not.
You can learn steps, but you cannot learn how to boogie.
If you don't vote, you don't count.
You cannot play with fire.