Regarding what should be done and what should not, it is necessary that in view of the requirements of time and place, one should either trust one's enemies or make war.
तस्माद् विश्वसितव्यं च विग्रहं च समाचरेत्। देशं कालं च विज्ञाय कार्याकार्यविनिश्चये॥