Mbh 12.130.2a

"'Bhishma said, "Conversant as thou art with duties, thou hast, O bull of Bharata's race, asked me a question relating to mystery (in connection with duties).[388] Without being questioned, O Yudhishthira, I could not venture to discourse upon this duly. Morality is very subtle. One understands it, O bull of Bharata's race, by the aid of the texts of scriptures. By remembering what one has heard and by practising good acts, some one in some place may become a righteous person. By acting with intelligence the king may or may not succeed in acquiring wealth.[389] Aided by thy own intelligence do thou think what answer should be given to thy question on this head. Listen, O Bharata, to the means, fraught with great merit, by which kings may conduct themselves (during seasons of distress). For the sake of true morality, however, I would not call those means righteous. If the treasury be filled by oppression, conduct like this brings the king to the verge of destruction. Even this is the conclusion of all intelligent men who have thought upon the subject. The kind of scriptures or science which one always studies gives him the kind of knowledge which it is capable of giving. Such Knowledge verily becomes agreeable to him. Ignorance leads to barrenness of invention in respect of means. Contrivance of means, again, through the aid of knowledge, becomes the source of great felicity. Without entertaining any scruples and any malice,[390] listen to these instructions. Through the decrease of the treasury, the king's forces are decreased. The king should, therefore, fill his treasury (by any means) like to one creating water in a wilderness which is without water. Agreeably to this code of quasi-morality practised by the ancients, the king should, when the time for it comes,[391] show compassion to his people. This is eternal duty. For men that are able and competent,[392] the duties are of one kind. In seasons of distress, however, one's duties are of a different kind.