Now, when your weapons are dulled, your ardour damped, your strength
exhausted and your treasure spent, other chieftains will spring up to
take advantage of your extremity. Then no man, however wise, will be
able to avert the consequences that must ensue.
Following Tu Yu, I understand 善 in the sense of “to make good,”
i.e. to mend. But Tu Mu and Ho Shih explain it as “to make good
plans”—for the future.