He who knows his enemy and himself well will not be defeated easily.
When envoys are sent with compliments in their mouths, it is a sign that the enemy wishes for a truce.
If you know neither the enemy nor yourself, you will succumb in every battle
He will win who knows how to handle both superior and inferior forces.
Rely not on the likelihood of the enemy's not coming, but on our own readiness to receive him
One mark of a great soldier is that he fight on his own terms or fights not at all.