Sārathi

Chapter 17: Sraddhatraya Vibhaga Yoga, verse 19

मूढग्राहेणात्मनो यत्पीडया क्रियते तपः।
परस्योत्सादनार्थं वा तत्तामसमुदाहृतम् ॥

Say itmūḍha-grāheṇātmano yat pīḍayā kriyate tapaḥ
parasyotsādanārthaṁ vā tat tāmasam udāhṛitam

Practice reciting

Translation

That austerity which is practised out of a foolish notion, with self-torture, or for the purpose of destroying another, is declared to be of the Tamasic nature.

Swami Sivananda

Classical commentariesFor deeper study. Most are in the original Sanskrit.

Advaita

Non-dual: the self and the absolute are one.

Vishishtadvaita

Qualified non-dual: souls are real parts of the divine.

Dvaita

Dual: the soul and God are eternally distinct.

Shuddhadvaita

Pure non-dual, centred on grace and devotion.

Kashmir Shaivism

The Gita read through Trika Shaiva philosophy.

Modern teachers

20th-century teachers writing for today's readers.