Mahabharata Santi Parva Chapter 104:2

Mahabharata Santi Parva (Rajadharmanusasana Parva) Chapter 104:2 A cquisitions that are future should be regarded by one as not one's own. Acquisitions that have disappeared, should also be regarded by one as not one's own. Destiny should be regarded as all powerful. They that think in this strain are said to be possessed of wisdom. Such a habit of looking at things is an attribute of the good. Many persons who are equal or superior to thee in intelligence and exertion, though deprived of wealth, are not only alive but are never ruling kingdoms. They are not, like thee. They do not indulge in grief like thee. Therefore, cease thou to grieve in this way. Art thou not superior to those men, or at least equal to them in intelligence and exertion?' The king said, 'I regard the kingdom which I had with all its appendages to have been won by me without any exertion. All-powerful Time, however, O regenerate one, has swept it away. The consequence, however, that I see, of my kingdom having been swept away by Time as by a stream, is that I am obliged to support upon whatever I obtain (by charity).' The sage said, 'Moved by the knowledge of what is true (in life) one should never grieve for either the past or the future. Be thou of such a frame of mind, O prince of Kosala, in respect of every affair that may engage thy attention. Desiring to obtain only that which is obtainable and not that which is unobtainable, do thou enjoy thy present possessions and never grieve for that which is absent. Be thou delighted, O prince of Kosala, with whatever thou succeedest in winning with ease. Even if divested of prosperity, do not grieve for it but seek to preserve a pure disposition. Only an unfortunate man who is of a foolish understanding, when deprived of former prosperity, censures the supreme Ordainer, without being contented with his present possessions. Such a person regards others, however undeserving, as men blessed with prosperity. For this reason, they that are possessed of malice and vanity and filled with a sense of their own importance, suffer more misery still. Thou however, O king, art not stained by such vices. Endure the prosperity of others although thou art thyself divested of prosperity. They that are possessed of dexterity succeed in enjoying that prosperity which is vested in others Prosperity leaves the person that hates others. Men possessed of righteous behaviour and wisdom and conversant with the duties of Yoga renounce prosperity and sons and grandsons of their own accord. Others, regarding earthly wealth to be exceedingly unstable and unattainable, dependent as it is upon ceaseless action and effort, are also seen to renounce itThou seemest to be possessed of wisdom. Why dost thou then grieve so piteously, desiring things that should not be desired, that are unstable, and that are dependent on others? Thou desirest to enquire after that particular frame of mind (which would enable thee to enjoy felicity notwithstanding the loss of thy possessions).