No proceeding is better than that which you have concealed from the enemy until the time you have executed it. To know how to recognize an opportunity in war, and take it, benefits you more than anything else. Nature creates few men brave, industry and training makes many. Discipline in war counts more than fury.
Sun Tzu, Niccolo Machiavelli (2013). “The Complete Art of War”, p.424, Simon and Schuster