Ze`ir Anpin (Aramaic: זְעֵיר אַנפִּין meaning "Lesser Countenance/Small Face", is a revealed aspect of God in Kabbalah, comprising the emotional sephirot attributes: Chesed, Gevurah, Tiphereth, Netzach, Hod and Yesod.
The Sifra D'Tzniuta portrays it as the revealed face of God, and the Idra Rabba elaborates on the Kabbalistic significance of its several attributes [citation needed].
In 16th century Lurianic doctrine it becomes systemised as one of the 6 Primary Partzufim Divine Personae, as part of the cosmic process of Tikkun Rectification.
Within the tetragrammaton, the first two letters signify the Concealed World/Upper Unity with God, and the latter two signify the Created World/Lower Unity: "For the sake of the union of the Holy One Blessed be He, and His Shekhinah, to unite the name Y-H with V-H in a perfect union, in the name of all Israel" In Lurianic Kabbalah, the origin of disharmony in the Sephirot is located earlier, in the primordial Realm of Tohu before the creation of Man, though later sin brings further exile.
The task of man, while also affecting Male-Female union on High, involves Messianic redemption of the exiled "Sparks of Holiness" (Birur) from Tohu that are scattered within Physical existence.