If the devil/satan rules the world why he keeps us alive . Why doesn’t he (or she/it) kill all.
John 14:30
and as per Buddhism – see Kassaka Sutta – http://www.vipassana.com/canon/samyutta/sn4-19.php

Buddha says that the devil (called mara in Buddhism) has dominion over everything that we see with eyes , hear with ears , smell, touch, taste, feel in emotions and think in thoughts in mind .

Wolfechu – Remember we all are moving towards death at some point or another.