When Śrī Arjuna, a warrior, wanted to forsake his duty of fighting a war, the Supreme Lord, Kṛṣṇa, advised him, "Perform your prescribed duty, for doing so is better than not working. One cannot even maintain one's physical body without work."
We can see that the process of performing fruitive actions and experiencing their results is like a mammoth tree sprouting endless branches and twigs. Can the performer of actions who experiences the endless fruits of that mammoth tree ever enjoy peace and benediction? No. Therefore it is said, "In the dispensation of providence, mankind cannot have any rest." Even in this lifetime, one who performs fruitive work is totally entangled in the cycle of karma as he sits on the tree of material existence. As a result, the soul must enter 8,400,000 species and suffer the threefold miseries, never finding any rest or peace.
Yet people find it impossible to renounce fruitive activities. Even the so-called sannyāsīs who make a show of renouncing such activities must still perform many activities, at least to relieve their hunger. Śrīpāda Śaṅkarācārya, seeing the condition of the sannyāsīs during his time, commented, "One takes on many different garbs just to fill one's stomach." And trying to give up all activities is no solution. When Śrī Arjuna, a warrior, wanted to forsake his duty of fighting a war, the Supreme Lord, Kṛṣṇa, advised him, "Perform your prescribed duty, for doing so is better than not working. One cannot even maintain one's physical body without work."