Complex sentence: The practice of the group focuses primarily on the formless, immanent model of practice knows as "silent illumination" and as such is closely allied to Chan, Zen and Dzogchen.
Split into simpler sentences: The practice of the group focuses primarily on the formless, immanent model of practice knows as "silent illumination". As such, the spirit of the practice is closely allied to Chan, Zen and Dzogchen.