Mahabharata 3.200.7

3.200.7

mūḍho naikṛtikaścāpi capalaśca dvijottama |
sukhaduḥkhaviparyāso yadā samupapadyate |
nainaṃ prajñā sunītaṃ vā trāyate naiva pauruṣam || 7 ||

Markandeya continued, "O Yudhishthira, the virtuous fowler, eminent in pity, then skilfully addressed himself again to that foremost of Brahmanas, saying, 'It is the dictum of the aged that the ways of righteousness are subtle, diverse and infinite. When life is at stake and in the matter of marriage, it is proper to tell an untruth. Untruth sometimes leads to the triumph of truth, and the latter dwindles into untruth. Whichever conduces most to the good of all creatures is considered to be truth. Virtue is thus perverted; mark thou its subtle ways. O best of virtuous men, man's actions are either good or bad, and he undoubtedly reaps their fruits. The ignorant man having attained to an abject state, grossly abuses the gods, not knowing that it is the consequence of his own evil karma. The foolish, the designing and the fickle, O good Brahmana, always attain the very reverse of happiness or misery. Neither learning nor good morals, nor personal exertion can save them. And if the fruits of our exertion were not dependent on anything else, people would attain the object of their desire, by simply striving to attain it.