Sun Tzu: 敵間之來間我者，因而利之，導而捨之，故反間可得而用也；

敵間之來間我者，因而利之，導而捨之，故反間可得而用也； — Sun Tzu

敵間之來間我者，因而利之，導而捨之，故反間可得而用也；

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兵者，國之大事 ，死生之地，存亡之道，不可不察也。 — Sun Tzu
吾士無余財，非惡貨也。無余命，非惡壽也。 — Sun Tzu
非利不動，非得不用，非危不戰。主不可以怒而興師，將不可以慍而致戰；合于利而動，不合于利而止。怒可以復喜，慍可以復悅，亡國不可以復存，死者不可以復生。故明君慎之， — Sun Tzu
數賞者，窘也；數罰者，困也； — Sun Tzu
This is the real enemy, the invader from the East, the Druze, the ruffian, the o — George Bernard Shaw
If the red slayer think he slays, Or if the slain think he is slain, They know n — Ralph Waldo Emerson
Think of and look at your work as though it were done by your enemy. If you look — Samuel Butler
Il est triste que souvent, pour être bon patriote, on soit l'ennemi du reste des — Voltaire
A person often meets his destiny on the road he took to avoid it. — Jean de La Fontaine
We enter the world alone, we leave it alone. — James Anthony Froude
I forbid you to be cast down or depressed. It is not enough if you do not shrink — Seneca
True character stands the test of emergencies. Do not be mistaken, it is weaknes — Napoleon