Spirit Rock Meditation Center: dharma talks and meditation instruction
Nikki Mirghafori: Dharma Talk: Samadhi, the Five Jhanic Factors, and the Five Hindrances (Retreat at Spirit Rock)
(Spirit Rock Meditation Center) What is samatha Practice (concentration)? Why practice samatha? What is the different between samatha (a practice), samadhi (the state), and vipassana (insight practi