Applying this principle to a person's 'Avodah' [we learn] that in order to perform the constructive 'Avodah' of וַעֲשֵׂה טוֹב, first there needs to be a preventative 'Avodah' of סוּר מֵׂרָּע, and since within this itself the requirement is to prepare a dwelling for a great and awesome King, it is not enough just to clean the dwelling, but also does there need to be a most thorough cleaning, meaning there needs to be the ultimate סוּר מֵרָע, so that not only is he pushing away the רַע – the bad, but also is he completely repulsed by anything that is evil, and [consequently] is there no possibility of him having anything to do with it, and as the Rebbe Maharash explains in his Maamor with the opening words: ‘Ravtoh Es Rivom’ (This Maamor was said more than one hundred years earlier) that there is a vast difference between them.
This is so because, when someone is repulsed by evil, he will become enraged with the evil and it will be his absolute enemy, whereas, someone who only 'turns away from evil’ is merely pushing the evil from his heart, due to the self-nullification of his own will for the supernal will of Hashem, but he does not hate the evil in essence, and then [in such an instance] there still remains room for the evil to take nurture from him.
