This is entirely because this Atika is in one light, that is, under the sway of Chassadim, which is why there is no room for Judgments to appear. It is completely joyous and never changing from shining with mercy. Even though we distinguish among three columns in it – right, left, and central – it never deviates from the aspect of the right column and is always considered to be of mercy and Chassadim. It is present in the thirteen attributes of Mercy, because the incomprehensible Chochmah within it, divided into three times four, equaling twelve, while it, Atika itself includes them and has control over them. Therefore, there are thirteen attributes including it.
The Ancient One Who Exists Beyond All Worlds
Idra Zuta 1:17