Bhagavad Gita Verse 6.5

अपने द्वारा अपना संसार- समुद्रसे उद्धार करे और अपनेको अधोगतिमें न डाले; क्योंकि यह मनुष्य आप ही तो अपना मित्र है और आप ही अपना शत्रु है|

Dear Arjuna, one should lift himself through his own efforts. He success or failure in performing his Karma should be the result of his own doing. Should a man fail, he should not degrade himself, O Arjuna, for he is his own true friend as well as his own true enemy.