"This book on the frames of reference is based to some extent on my own thoughts and opinions. In some spots it may not be directly in line with the original text (Satipatthâna Sutta), because my primary aim has been to get to the heart of the matter, so that it can be conveniently put into practice. The eBook also includes a section on the "Duties of the Sangha", that is, the laws and regulations and disciplinary standards (Vinaya).