Mbh 12.331.1a

"'"Narada said, 'By listening to such scriptures as are blessed, as bring about tranquillity, as dispel grief, and as are productive of happiness, one attains to (a pure) understanding, and having attained to it obtains to high felicity. A thousand causes of sorrow, a hundred causes of fear, from day to day, afflict one that is destitute of understanding, but not one that is possessed of wisdom and learning. Do thou, therefore, listen to some old narratives as I recite them to you, for the object of dispelling thy griefs. If one can subjugate one's understanding, one is sure to attain to happiness. By association of what is undesirable and dissociation from what is agreeable, only men of little intelligence, become subject to mental sorrow of every kind. When things have become past, one should not grieve, thinking of their merits. He that thinks of such past things with affection can never emancipate himself. One should always seek to find out the faults of those things to which one begins to become attached. One should always regard such things to be fraught with much evil. By doing so, one should soon free oneself therefrom. The man who grieves for what is past fails to acquire either wealth or religious merit or fame. That which exists no longer cannot be obtained. When such things pass away, they do not return (however keen the regret one may indulge in for their sake). Creatures sometimes acquire and sometimes lose worldly object. No man in this world can be grieved by all the events that fall upon him. Dead or lost, he who grieves for what is past, only gets sorrow for sorrow. Instead of one sorrow, he gets two.[1763] Those men who, beholding the course of life and death in the world with the aid of their intelligence, do not shed tears, are said to behold properly. Such persons have never to shed tears, (at anything that may happen).