Fixed fortifications are a monument to the stupidity of man.
Notes from Wikiquote
Unsourced variant: Fixed fortifications are a monument to the stupidity of man. Anything built by man, can be destroyed by him.
It is foolish and wrong to mourn the men who died. Rather we should thank God that such men lived.
There is no proof nor yet any denial. We were, We are, and we will be.
Quote text and notes from Wikiquote: George S. Patton (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.