Mahabharata Santi Parva Chapter 287:3

Mahabharata Santi Parva (Mokshadharma Parva) Chapter 287:3 One capable of resting on one's own self would never covet the possessions of others, would not think of gains unacquired, would not feel delighted at the acquisition of even immense wealth; and would not yield to sorrow at the loss of wealth. Neither friends, nor wealth, nor high birth, nor scriptural learning, nor mantras, nor energy, can succeed in rescuing one from sorrow in the next world. It is only by conduct that one can attain to felicity there. The Understanding of the man unconversant with Yoga can never be directed towards Emancipation. One unconversant with Yoga can never have happiness. Patience and the resolution to cast off sorrow, these two indicate the advent of happiness. Anything agreeable leads to pleasure. Pleasure induces pride. Pride, again, is productive of sorrow. For these reasons, I avoid all these. Grief, Fear, Pride,—these that stupefy the heart,—and also Pleasure and Pain, I behold as (an unconcerned) witness since my body is endued with life and moves about. Casting off both wealth and pleasure, and thirst and error, I wander over the earth, freed from grief and every kind of anxiety of heart. Like one that has drunk nectar I have no fear, here or hereafter, of death, or iniquity, or cupidity, or anything of that kind. I have acquired this knowledge, O Brahmana, as the result of my severe and indestructible penances. It is for this reason, O Narada, that grief, even when it comes to me, does not succeed in afflicting me.'