瑜伽論記 16.533

16.533

膿雖漸出，猶未頓盡者，見惑雖斷仍未頓盡。後更廣開至膿去麁盡者，此喻聖人上品見道即盡。

'Although the pus gradually comes out, it is not yet entirely exhausted at once' means that although the afflictions of seeing are severed, they are still not entirely exhausted at once. 'Later, opening it more widely until the pus is removed and the coarse [discharge] is exhausted': this is a metaphor for the noble person's superior grade of the path of seeing being completely exhausted.