The thirteen chapters by Sun Tzu decribed the art of war at that time , due to which Chinese military philosophy came into being.
                                                        —— Sun Yat-sen

   There  is  a saying  in  the book  of  Sun Wu Tzu , the great  military scientist of ancient China, "Know the enemy and know yourself, and you ean fight a hundred battles with no damger of defeat",which refers both to the stage of learning and to the stage of application,both to knowing the laws of the development of objective reality  and to deciding on our own action in accordance with these laws in order to overcome the enemy facing us. We should not take this saying lightly.
                                                         —— Mao Zedong

   The Art  of  War by Sun Zi  is  a book researching  the fundamental  of directing  wars …… The  normal  forces  and  extraordinary  forces are a dialectical  unity , of  which  all  generals  must  have  a good  grasp . Extraordinary forces contain normal ones, and normal, extraordinary. There should be unpredictable changes in them.
                                                        —— Liu Bocheng

   I have read a variety of books on the art  and  strategies of war , and those by Sun Wu are deep. Sun Tzu is form Qi, and his given name is Wu. He wrote  13 chapters  of  the art of war , practiced  them  among ladies-in-waiting, and finally he became a general . He defeated Chu in the west and entered is capital city--Ying, and overawed Qi and Jin in the North. About one hundred years later, there was a Sun Bin, who is his offspring.
                                    —— Cao Cao(Emperor of Wei State)

   Of the books on the art of war I have read, no one is better than those by  Sun Wu . The thirteen  chapters  by  Sun Wu  covers no more  than  the strategies of weaknesses and strengths . If one can apply those strategies well in conducting warfare, no one can defeat him.
                 —— Li Shimin(Second Emperor of the Tang Dynasty)

   Both the used words and  contents of Sun Wu Tzu's Art of War are nice . Even the Sage and Worthy conducting warfare cannot do better than it.
            —— Qi Jiguang(military scientist of the Ming Dynasty)

   The Chinese philosopher, Sun Tzu, 2500 years ago said winning a hundred victories  in  a hundred bettles in  not the acme of skill ; to sabdue the enemy without fighting is acme of skill . A truely successful army  is one that,because of its strength and ability and dedication,will not be called upon to fight because no one will dare to provoke it.
                              —— Ronald Reagan(former US President)

  In a chapter of The Art of War called the "Employment of Secret Agents", Sun Tzu gives the basics  of espionage as it was pnacticed in 400 B.C . by the Chinese —— much as it is pnacticed today …… To Sun Tzu belongs the credit  not only  for  this  first  remarkable  analysis  of  the ways  of espionage  but  also  for  the first written  recomendations regarding  an organized  intelligence  service . …… in short , on the  whole craft  of intelligence.
                            —— Allen Dulles(former US CIA derector)

   The nacient Chinese philosopher Sun Tzu is the greatest wisdom  in  the world . Staff in our company must worship him , recite his words strictly, use them in a flexible way, and thus our company can blossom.
                                       —— Konosuke Matsushita(Japan)