Mahabharata 12.228.2

12.228.2

prajñayā nirmitairdhīrāstārayantyabudhānplavaiḥ |
nābudhāstārayantyanyānātmānaṃ vā kathaṃcana || 2 ||

"Vyasa said, 'If Emancipation be desirable, then knowledge should be acquired. For a person who is borne now up and now down along the stream of Time or life, knowledge is the raft by which he can reach the shore. Those wise men who have arrived at certain conclusions (regarding the character of the soul and that which is called life) by the aid of wisdom, are able to assist the ignorant in crossing the stream of time or life with the raft of knowledge. They, however, that are ignorant, are unable save either themselves or others. He who has freed himself from desire and all other faults, and who has emancipated himself from all attachments, should attend to, these two and ten requirements of yoga, viz., place, acts, affection, objects, means, destruction, certainty, eyes, food, suppression, mind and survey.