As little children, we asked our parents to leave the door open just a little so that some light could spill in from the hall. Nothing is as foreboding as an unspecified threat. We have no way of dealing with a vague menace, for we don't really know what it is that threatens us, and our imaginations run riot. The Midrash asks what is the connection between this week's Parsha and the 98 curses that conclude last week's Parsha. The terminology of this Midrash is puzzling.
Nothing turns one's face green quicker than the fear of the unknown.
The Jewish People had just heard 98 curses. 98 curses for 98 reasons. And each of those reasons naturally had its own cure. These two curses turned their faces green because the reasons for them were left unspecified. It's enough to turn one's face green.