Moses of Burgos, “The Left Pillar.”

Jewish Mysticism
There is a left [side] corresponding to the right, intended to perfect the right side, to punish and chastise with ‘chastisements of love’ those who walk in a bad way in order to purify them.

Translated by Elliot Wolfson in “Light Through Darkness- The Ideal of Human Perfection in the Zohar,” Harvard Theological Review 81 (1988)- 73-95, from Moses of Burgos, “The Left Pillar,” ed. Scholem, Tarbitz 4 (1933) 209.