Ramana MaharshiIf one wants to be saved, one is given the following true and essential advice: just as the tortoise draws all its five limbs within its shell, so one should draw the five senses within and turn one’s mind Selfward. This alone is happiness.

Ramana Maharshi

Brahma Sutras Reference Materials:

Video/Audio Lectures

Swami Paramarthananda
390 classes (~55 mins each)

Swami Dayananda Saraswati
99 classes (~60 mins each)

Swami Tattvavidananda
14 classes (search for "Adhyasa Bhasyam" on the linked page)

Swami Viditatmananda
99 classes on First Four Sutras (~90 mins each)

002 Brahma sūtra Chathsutri

Swami Paramananda Bharti
7 classes on Adhyasa Bhashya or Shankaracharya's Intro (~60-90 mins each)

Adhyasa Bhashyam 6