There are cases in which the greatest daring is the greatest wisdom.

[Es giebt Fälle, wo das höchste Wagen die höchste Weisheit ist.]

Karl von Clausewitz (1780-1831) Prussian soldier, historian, military theorist

On War [Vom Kriege], Book 2, ch. 5 “Critical Analysis [Kritik]” (2.5) (1832) [tr. Graham (1873)]
    (Source)

Jolles (1943) translates this passage the same as Graham. (Source (German)). Alternate translation:

There are times when the utmost daring is the height of wisdom.
[tr. Howard & Paret (1976)]