Zohar and Nefesh HaChayim

Both texts describe intense mystical devekut (attachment to the divine) achieved through focused spiritual practice. Nefesh HaChayim emphasizes kavanah in tefillah—the soul departing the body entirely through concentration on sacred words of prayer, with intentional focus (חושק ומתאוה) on the specific utterance. The Zohar passage describes mystical ascent involving closed eyes, hearing divine voices (קול גדפי דכרוביא), and attachment to higher realms through whispered speech (בלחישו אתדבקן). The difference is methodological and phenomenological: Nefesh HaChayim stresses directed intention (kavanah) toward prayer formulas as the mechanism, while Zohar emphasizes sensory-mystical experience (hearing angelic voices, closing eyes) and whispering as the path to devekut. Both achieve the same spiritual goal but diverge on what mediates the experience.