Nicht Kleckern sondern Klotzen!
Notes from Wikiquote
As quoted in How Great Generals Win (1993) by Bevin Alexander, p. 227; this statement became a stock phrase which Hitler often repeated. It is comparable to the adage "Don't do things by half."
Quote text and notes from Wikiquote: Heinz Guderian (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.