Nisargadatta MaharajQ: No question of reconditioning, changing, or eliminating the mind? M: Absolutely none. Leave your mind alone, that is all. Don't go along with it. After all, there is no such thing as mind apart from thoughts which come and go obeying their own laws, not yours. They dominate you only because you are interested in them. It is exactly as Christ said 'Resist not evil'. By resisting evil you merely strengthen it.

Nisargadatta Maharaj

Tattva Bodha
Knowledge of Reality, by Śaṅkarāchārya

Tattva Bodha Reference Materials:

Video/Audio Lectures

Swami Paramarthananda
36 classes (~30 - 55 mins each)

Swami Anubhavananda
7 classes (~75 mins each)

Tattvabodha English 2 of 7 @ Prem Puri 2012

Swami Sarveshananda
27 classes (~45 - 60 mins each)

Swami Swatmananda
22 classes (~60 - 90 mins each)

20 vedanta fundas- full session with meditation

Swami Narasimhananda
12 classes (~60 - 90 mins each)

Introduction to Vedanta Tattvabodha Narasimhananda 2

Swami Viditatmananda
9 classes (search for "Tattvabodha" on the linked page)