Transliteration
mac-cittā mad-gata-prāṇā bodhayantaḥ parasparam |
kathayantaśca māṃ nityaṃ tuṣyanti ca ramanti ca || 9 ||
Translation
With their minds focussed on Me, with their life-force centred in Me, confiding in one another and always speaking of Me, they live in contentment and bliss at all times.
Purport
In earlier two Chapters Bhagvan Shri Krishna explained two different processes that help to achieve unbroken devotion towards Shri Krishna God. The two methods in short 1. To sing, read, discuss, etc the glory of Bhagvan Shri Krishna 2. The trust in him that He is the Supreme Being and creator of the whole universe.
In this Shloka Bhagvan Shri Krishna further explains how those two methods when used together make sure of absolute success. Reading, hearing, singing and discussing the glory and leela (the divine mystic plays) Bhagvan Shri Krishna helps the soul and heart get absorbed in the divine Gunas or attributes of Bhagvan Shri Krishna. Having trust in him and knowing that Shri Krishna alone is the Supreme Being and the creator of the whole universe removes all confusion from mind and helps the mind got focused on Bhagvan Shri Krishna.
More absorbed one is in the devotion of Shri Krishna more he will have trust in Shri Krishna. Then more trust a devotee has on Shri Krishna more he gets absorbed into the devotion of Shri Krishna. These two methods,1. Involved in the glory of Shri Krishna and 2. the trust help the heart and mind of a devotee to achieve undivided devotion.
Bhagvan Shri Krishna further explained such person achieves perfect bliss and joy even during the whole process