Q: By what means is the root-practice to be performed?
A: Only by sitting in meditation, for it is accomplished by dhyana (ch’an) and samadhi.
Q: Please describe dhyana and samadhi.
A: When wrong thinking ceases, that is dhyana; when you sit contemplating your original nature, that is samadhi, for indeed that original nature is your eternal mind.
Blofeld, John: Zen teaching of instantaneous awakening;
being the teaching of the Zen master Hui Hai.
Devon 2015, p. 44-45