The bible says we should give no place to the devil. It does not mean that bad things will never happen to us. It just simply means that when they do because we have been walking with Jesus no evil will over take us. The Lord clearly states in Psalm 91:15 (He shall call upon me, and I will answer him: I will be with him in trouble; I will deliver him, and honour him). Trust Him today with all your heart - He will never fail you.