Kautilya's Arthashastra 7.1.13

7.1.13

parasmādd hīyamānaḥ saṃdadhīta //

Whoever is inferior to another shall make peace with him; whoever is superior in power shall wage war; whoever thinks "no enemy can hurt me, nor am I strong enough to destroy my enemy," shall observe neutrality; whoever is possessed of necessary means shall march against his enemy; whoever is devoid of necessary strength to defend himself shall seek the protection of another; whoever thinks that help is necessary to work out an end shall make peace with one and wage war with another. Such is the aspect of the six forms of policy.