If I want to be close to G-d I can eat and drink also. The greatest evil in the world is that we keep away from one another. On Purim the great light is shining that everything is close. Evil is always new. The answer is very simple.
Evil is really new all the time.
Evil has a newness. With the utmost newness in the world. On Purim G-d gives us this tremendous holy newness, mamash I am really starting all over again. Yom Kippur, holy as we are, we still talk about what we did yesterday. So it's still not completely new.