Alef א — air / chest
Mother letter; breath between fire and water
Alef is the Mother of air in the Sefer Yetzirah classification. Its chest placement is an editorial body projection for breath and the mediating air element, not a claim that the text identifies a physical organ.
Point 1 of 22 in Sefer Yetzirah Letter Body
Cross-tradition overlaps
No overlapping points are registered for this point.
Sources
Sefer Yetzirah (primary_canonical)
Chapters 3–5 classify the three Mothers, seven Doubles, and twelve Elementals, with planetary and zodiacal correspondences; cited by chapter and section in Kaplan’s standard English edition.
Aryeh Kaplan, Sefer Yetzirah: The Book of Creation in Theory and Practice (secondary_translation)
Commentary and tables explain the letter groups, planets, zodiac signs, and later body analogies; see commentary to chapters 3–5.