The Supreme Lord is the purest of the pure. Therefore, anyone who is constantly Krishna conscious is also the purest of the pure. (Purport, Bhagavad-gita 8.5)
A pure devotee cannot forget the Supreme Lord for a moment, and similarly the Supreme Lord cannot forget His pure devotee for a moment. (Purport, Bhagavad-gita 8.14)
If we want to get free from anxiety, then the best course is to understand Krishna and be situated always in Krishna consciousness. (Purport, Bhagavad-gita 10.4-5)
The Supreme Lord is the purest of the pure. Therefore, anyone who is constantly Krishna conscious is also the purest of the pure. (Purport, Bhagavad-gita 8.5)