Kann nicht / Cannot Schicksal / Fate Verachtung / Scorn
What can be shown, cannot be said.
Truth cannot be defeated.
You cannot schedule death.
The key to heaven's gate cannot be duplicated.
Sports cars from the '50s and '60s are my favorites.
Do not let what you cannot do interfere with what you can do.
You cannot govern, you cannot administrate, with an ignoramus.
If a problem cannot be solved, enlarge it.
You cannot play with fire.