To ... not prepare is the greatest of crimes; to be prepared beforehand for any contingency is the greatest of virtues.

A warrior who is prepared to fight must also be prepared to die.

The opportunity to secure ourselves against defeat lies in our own hands

There are not more than five primary colours, yet in combination they produce more hues than can ever been seen.

The end and aim of spying in all its five varieties is knowledge of the enemy; and this knowledge can only be derived, in the first instance, from the converted spy. Hence it is essential that the converted spy be treated with the utmost liberality.

The supreme excellence is not to win a hundred victories in a hundred battles. The supreme excellence is to subdue the armies of your enemies without having to fight them.

Hence the saying: One may know how to conquer without being able to do it.