Foreknowledge cannot be gotten from ghosts and spirits, cannot be had by analogy, cannot be found out by calculation. It must be obtained from people, people who know the conditions of the enemy.

Even the finest sword plunged into salt water will eventually rust.

In peace prepare for war, in war prepare for peace. The art of war is of vital importance to the state. It is matter of life and death, a road either to safety or to ruin. Hence under no circumstances can it be neglected.

Explanations are relative in the sense that their validity always depends...on how the thing to be explained is described.

The best ship, the best culture, the best knowledge, is the one which allows us to go farther, explore more territories or oceans of reality, and have the least damaging leaks possible.

The command of our language is crucial to focusing our thoughts and communicating them with precision to others.