On the teachings of Tang Hoi, one of the first Buddhist teachers of Vietnam. With commentary from Thich Nhat Han.
One of the most insightful buddhist texts I have read. There is repetition, but even with this - I will need to read this again carefully, to further understand the teachings. It is interesting to see how Buddhist psychology from 100s of years ago, centred around the nature of the mind - is still relevant today.