Mahabharata 13.147.4

13.147.4

saṃśayaḥ sugamo rājannirṇayastvatra durgamaḥ |
dṛṣṭaṃ śrutamanantaṃ hi yatra saṃśayadarśanam || 4 ||

"Bhishma said, 'I think, there is no doubt in this. Listen to me, O thou of great wisdom! I shall answer thee. The question thou hast asked is certainly proper. It is easy to cherish doubt. But the solution of that doubt is difficult. Innumerable are the instances, in respect of both direct perception and audition (or the scriptures), in which doubts may arise. Certain persons, who delight in the name of logicians, verily imagining themselves to be possessed of superior wisdom, affirm that direct perception is the only authority. They assert that nothing, however true, is existent which is not directly perceivable; or, at least they doubt the existence of those objects. Indeed, such assertions involve an absurdity and they who make them are of foolish understanding, whatever may be their pride of learning. If, on the other hand, thou doubtest as to how the one (indivisible Brahman) could be the cause, I answer that one would understand it only after a long course of years and with the assistance of Yoga practised without idleness. Indeed, O Bharata, one that lives according to such means as present themselves (without, i.e., one's being wedded to this or that settled mode of life), and one that is devoted (to the solution of the question), would be capable of understanding it. None else, truly, is competent for comprehending it. When one attains to the very end of reasons (or reasoning processes), one then attains to that excellent and all comprehending knowledge--that vast mass of effulgence which illumines all the universe (called Brahma). That knowledge, O king, which is derived from reason (or inferences) can scarcely be said to be knowledge. Such knowledge should be rejected. It should be noted that it is not defined or comprehended by the word. It should, therefore, be rejected!'"