WAR IS A GAME BOTH OBJECTIVELY AND SUBJECTIVELY.
If we now take a look at the subjective nature of War, that is to say, at those conditions under which it is carried on, it will appear to us still more like a game.

Primarily the element in which the operations of War are carried on is danger; but which of all the moral qualities is the first in danger?
COURAGE.

Now certainly courage is quite compatible with prudent calculation, but still they are things of quite a different kind, essentially different qualities of the mind; on the other hand, daring reliance on good fortune, boldness, rashness, are only expressions of courage, and all these propensities of the mind look for the fortuitous (or accidental), because it is their element.
We see, therefore, how, from the commencement, the absolute, the mathematical as it is called, nowhere finds any sure basis in the calculations in the Art of War; and that from the outset there is a play of possibilities, probabilities, good and bad luck, which spreads about with all the coarse and fine threads of its web, and makes War of all branches of human activity the most like a gambling game.
22.

HOW THIS ACCORDS BEST WITH THE HUMAN MIND IN GENERAL.
Although our intellect always feels itself urged towards clearness and certainty, still our mind often feels itself attracted by uncertainty.
Instead of threading its way with the understanding along the narrow path of philosophical investigations and logical conclusions, in order, almost unconscious of itself, to arrive in spaces where it feels itself a stranger, and where it seems to part from all well-known objects, it prefers to remain with the imagination in the realms of chance and luck.
Instead of living yonder on poor necessity, it revels here in the wealth of possibilities; animated thereby, courage then takes wings to itself, and daring and danger make the element into which it launches itself as a fearless swimmer plunges into the stream.
Shall theory leave it here, and move on, self-satisfied with absolute conclusions and rules?
Then it is of no practical use.

Theory must also take into account the human element; it must accord a place to courage, to boldness, even to rashness.