Seems to be about me, but it isn't:
Today*, I think evil drips like big blobs of ethereal ooze through the fabric of the universe, and occasionally blobs on someone, which can make them mean until it drips off. If your spirit is smooth and sleek, it slips off of you in a day, or hours. If your spirit is calloused, it might taked days or a week to run off. If it is broken in many places, evil sticks, and pools in the hollows, thus possibly making one evil for years.
I just felt a drip.
*I reserve the right to modify, or completely change my thoughts on the subject from the moment of typing on into perpetuity. Ideas should be fluid.