A few months ago a friend wrote to me asking about the practice of ātma-vicāra (self-investigation or self-enquiry) and whether his description of his practice indicated that he was practising it correctly, and he ended his email saying:
I have tried the technique of diving into the heart exhaling your breath, explained in the small book The Technique of Maha Yoga published by Ramanashramam, [...] but this does not seem to work in my case.The following is adapted from the reply I wrote to him: