“In the midst of chaos, there is also opportunity”

“Opportunities multiply as they are seized.”

“The good fighters of old first put themselves beyond the possibility of defeat, and then waited for an opportunity of defeating the enemy.”

“Conform to the enemy's tactics until a favorable opportunity offers; then come forth and engage in a battle that shall prove decisive.”

“If you do not take opportunity   to   advance and reward   the   deserving,   your subordinates will not carry out your commands, and disaster will ensue.”

“If you know yourself but not the enemy, for every victory gained you will also suffer a defeat.”

“If we wish to wrest an advantage from the enemy, we must not fix our minds on that alone, but allow for the possibility of the enemy also doing some harm to us, and let this enter as a factor into our calculations.”