Ramana MaharshiOnly to such a mind which has gained the inner strength of one-pointedness, Self-enquiry will be successful. But a weak mind will be like wet wood put into the fire of jnana-vichara.

Ramana Maharshi

Bhakti Yoga
Path of Devotion

Reference Materials:

Video/Audio Lectures

Swami Atmapriyananda
Bhakti Retreat (~4 hrs)

Swami Atmapriyananda Gives an In-depth Retreat on Bhakti: The Simplest Path That Is Most Difficult

Swami Sarvapriyananda
2 talks (~60 mins each)

The Way of Love - I by Swami Sarvapriyananda

Swami Tadatmananda - Nārada Bhakti Sūtras
23 classes (~70 - 90 mins each)

Swami Yogatmananda - Narada Bhakti Sutras
2 talks (~100 mins each)