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I have a question on Sifu Terry's advice on using a chair. Is it okay to lean against a straight back chair, or should one sit more towards the front of the chair without leaning and without any back support? Thanks

Thanks for the heads up @Pilgrim , yet I haven't had any luck tracking that book down. There is a book available for pre-order that has the same cover but is named 'A Collection of Instructions on Kriya Yoga'. Do you think that will be the same one? https://www.kriya.org/merchandise/big_thumb/1/a-collection-of-instructions-on-kriya-yoga.jpg https://www.kriya.org/store/books/en

This is my obligatory first post . I have mostly been involved with practices derived from Hinduism but I am very open to practices from others.