And among them I include all that has served to train the bodies and fire the courage of your men, all that has made them adepts in every craft of war. One thing you must ever bear in mind: if you wish your men to follow you, remember that they expect you to plan for them. [42] Hence you must never know a careless mood; if it be night, you must consider what your troops shall do when it is day; if day, how the night had best be spent. [43] For the rest, you do not need me to tell you now how you should draw up your troops or conduct your march by day or night, along broad roads or narrow lanes, over hills or level ground, or how you should encamp and post your pickets, or advance into battle or retreat before the foe, or march past a hostile city, or attack a fortress or retire from it, or cross a river or pass through a defile, or guard against a charge of cavalry or an attack from lancers or archers, or what you should do if the enemy comes into sight when you are marching in column and how you are to take up position against him, or how deploy into action if you are in line and he takes you in flank or rear, and how you are to learn all you can about his movements, while keeping your own as secret as may be; these are matters on which you need no further word of mine; all that I know about them you have heard a hundred times, and I am sure you have not neglected any other authority on whom you thought you could rely. You know all their theories, and you must apply them now, I take it, according to circumstances and your need. [44] But," he added, "there is one lesson that I would fain impress on you, and it is the greatest of them all. Observe the sacrifices and pay heed to the omens; when they are against you, never risk your army or yourself, for you must remember that men undertake enterprises on the strength of probability alone and without any real knowledge as to what will bring them happiness. [45] You may learn this from all life and all history. How often have cities allowed themselves to be persuaded into war, and that by advisers who were thought the wisest of men, and then been utterly destroyed by those whom they attacked! How often have statesmen helped to raise a city or a leader to power, and then suffered the worst at the hands of those whom they exalted! And many who could have treated others as friends and equals, giving and receiving kindnesses, have chosen to use them as slaves, and then paid the penalty at their hands; and many, not content to enjoy their own share of good, have been swept on by the craving to master all, and thereby lost everything that they once possessed; and many have won the very wealth they prayed for and through it have found destruction. [46] So little does human wisdom know how to choose the best, helpless as a man who could but draw lots to see what he should do. But the gods, my son, who live for ever, they know all things, the