Matthew 10:16 "Look, I am sending you out like sheep among wolves; therefore be as shrewd as snakes and as innocent as doves."
I constantly try to anticipate what evil someone may do towards me, from innocent manipulation or positioning to a tactical disadvantage to downright horror scenarios.
If God counted whatever dark thought creeps in my mind it would be an extremely long list. I pray for forgiveness from God when I catch myself contemplating evil. But, evil sometimes creeps in... As long as we live in the flesh sin will follow us - but if we have faith in Jesus it will never overcome us.
I was in a very dark place in my mind when I turned to Jesus for the first time and I just called his name, I barely knew the bible, and he changed my heart. He knows me and you, he knows us better than we know ourselves and I would bet my life - he will save any man or woman from sin if only we call out to him for help.