Bhagavad Gita: Person considered saintly if he is properly situated in his determination (The Most Confidential Knowledge, Text 30, Chapter 9)

Sri-bhagavan uvaca

api cet su-duracaro
bhajate mam ananya-bhak
sadhur eva sa mantavyah
samyag vyavasito hi sah

 (The Most Confidential Knowledge, Text  30, Chapter 9)

Meaning: Even if one commits the most abominable action, if he is engaged in devotional service he is to be considered  saintly because he is properly situated in his determination.

**** Devotional service is more or less a declaration of war against the illusory energy. As long as one is not enough to fight the illusory energy, there may be accidental falldowns. But when one is strong enough, he is no longer subjected  to such falldowns.

Bhagavad Gita: Person considered saintly if he is properly situated in his determination (The Most Confidential Knowledge, Text 30, Chapter 9)