। ॥ ५१५ ॥
In plain words
So the cutting off of ignorance is not accomplished by action — not at all. When a thing's contact with something is what generates that thing's destruction, it goes in that very instant.
Close to the Sanskrit
Therefore the severance of ignorance is not at all accomplished by action. That of which the conjunction with a certain thing is the producer of destruction — [it perishes] in that very instant.