If their forces are substantial, prepare for them; if their forces are strong, avoid them.

All war is based on deception.

In making tactical dispositions, the highest pitch you can attain is to conceal them.

All warfare is based on deception. Therefore, when capable, feign incapacity; when active, inactivity. When near, make it appear that you are far away; when far away, that you are to lure him; feign disorder and strike him. When he concentrates, prepare against him; where he is strong, avoid him. Anger his general and confuse him. Pretend inferiority and encourage his arrogance.

To maintain an army at a distance causes the people to be impoverished.

There are roads which must not be followed, armies which must not be attacked, towns which must not be besieged, positions which must not be contested, commands of the sovereign which must not be obeyed.

In the midst of chaos, there is also opportunity.