I am such a sinful person, but since I have now gotten this opportunity, I must completely control my mind, life and senses and always engage in devotional service so that I may not fall again into the deep darkness and ignorance of material life.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
सोऽहं तथा यतिष्यामि यतचित्तेन्द्रियानिलः । यथा न भूय आत्मानमन्धे तमसि मज्जये
so'haṃ tathā yatiṣyāmi yatacittendriyānilaḥ | yathā na bhūya ātmānamandhe tamasi majjaye
SB 6.2.35