तौ हि द्विकार्यसाधकौ वश्यौ च भवतः ॥ कZ_०७.५.४४ ॥
tau hi dvikāryasādhakau vaśyau ca bhavataḥ
Car ces deux-là servent un double objectif et demeurent dociles sous ton contrôle.
It marks an asset as delivering two outcomes at once (e.g., gaining advantage while also keeping the counterpart bound), making them efficient instruments of policy.
Because assets that cannot be controlled become future liabilities—leaks, defections, or independent power centers.