The time for war has not yet come, but it will come, and that soon; and when it does come, my advice is to draw the sword and throw away the scabbard.
Speech to cadets at the Virginia Military Institute (March 1861); as quoted in Mighty Stonewall (1957) by Frank E. Vandiver, p. 131; this has sometimes been paraphrased as "When war does come, my advice is to draw the sword and throw away the scabbard."