The statement “it is enough that they exist in Zeir Anpin” means is that it is not necessary for them to spread but simply to be present as they are in their own intrinsic nature. Accordingly they do not radiate to the outside at all except what they can radiate through their vessels, because the function generated through them does not take place in them but in Daat, which is the overall function that emerges as a result. Accordingly, they are merely present. Daat, however, which is the offspring that emerges out of all this, must necessarily spread – for the result of this engrafting of Abba and Imma does indeed spread through the whole of Zeir Anpin, all of which is greatly affected as a result.