Evil at first was not such a evil we know
and also evil cant do any thing in our life he just can offer you to bad thing but always you choose the way and make a decision for your life.we should use our mind. evil is in every body internal but it is out too. evil is not just a significant thing,it refer to all people and thing that offer to abhorrent thing.
existence of evil rooted in free will power that God give to people and to evil.it doesn't mean God give them vice.God give them free will
Shruti