The present volume is the first collection of studies by Charles Mopsik to be published in English. It contains the contents of two separate volumes published in French, with an additional study which was published elsewhere. These seven studies focus on the function and character of sex and gender in Jewish Mysticism: (1) The Primeval Couple and the Primordial One in the Religions of the World; (2) The Masculine Woman; (3) Creation and Procreation: Beyond the Bounds of the Body - From the Hebrew Bible to Medieval Jewish Mysticism; (4) Genesis 1: 26-27: The Image of God, Man and Wife, and the Status of Women in the writings of the Early Kabbalists; (5) Genesis 2:24: 'They Become One Flesh': Several Interpretations by Medieval Jewish Mystics; (6) Union and Unity in the Kabbalah: The Proclamation of the Divine Unity and the Male/Female Couple; (7) The Secret of the Marriage of David and Batsheva.