1. Sun Tzu said: The art of war is of vital importance to
the State.
2. It is a matter of life and death, a road either to
safety or to ruin. Hence it is a subject of inquiry which can on
no account be neglected.
3. The art of war, then, is governed by five constant
factors, to be taken into account in one's deliberations, when
seeking to determine the conditions obtaining in the field.
4. These are: (1) The Moral Law; (2) Heaven; (3) Earth;
(4) The Commander; (5) Method and discipline.

[It appears from what follows that Sun Tzu means by "Moral
Law" a principle of harmony, not unlike the Tao of Lao Tzu in its
moral aspect. One might be tempted to render it by "morale,"
were it not considered as an attribute of the ruler in ss. 13.]

5, 6. The MORAL LAW causes the people to be in complete
accord with their ruler, so that they will follow him regardless
of their lives, undismayed by any danger.

[Tu Yu quotes Wang Tzu as saying: "Without constant
practice, the officers will be nervous and undecided when
mustering for battle; without constant practice, the general will
be wavering and irresolute when the crisis is at hand."]

7. HEAVEN signifies night and day, cold and heat, times and
seasons.
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