Mahabharata 12.10.26

12.10.26

atha cedātmabhāgyeṣu nānyeṣāṃ siddhimaśnute |
tasmātkarmaiva kartavyaṃ nāsti siddhirakarmaṇaḥ || 26 ||

These latter are always seen to lead lives of renunciation. They do not injure any one. They are, again, always aloof from a life of worldliness and are all Brahmacharins. If it be the truth that a person's success depends upon his own lot in life and not upon that of other, then (as a person born in the Kshatriya order) thou shouldst betake thyself to action. He that is reft of action can never have success. If they that fill only their own stomachs could attain to success, then all aquatic creatures would obtain it, for these have none else to support save their own selves. Behold, the world moves on, with every creature on it employed in acts proper to its nature. Therefore, one should betake oneself to action. The man reft of action can never obtain success.'"