"Against fools even the gods fight in vain"
Looking it up on wikiquote I get
Mit der Dummheit kämpfen Götter selbst vergebens.
Against stupidity the very gods Themselves contend in vain.
Against stupidity the gods themselves contend in vain.
Against stupidity the gods themselves labor in vain.
Against stupidity the gods themselves fight unvictorious
Against stupidity even the gods contend in vain.
Against stupidity gods themselves contend in vain.
With stupidity the gods themselves contend in vain.
With stupidity the gods themselves struggle in vain.