For the behoof of all his subjects the king should always seek to learn the acts and thoughts of all, O Yudhishthira; and for the reason he should engage spies and secret agents.
सदैव राज्ञा योद्धव्यं सर्वलोकाद् युधिष्ठिर। तस्माद्धेतोर्हि युञ्जीत मनुष्यानेव मानवः॥