'Evil' in the Bible

I write to you, fathers, because ye have known him who is from the beginning; I write to you, young men, because ye have overcome the evil. I write to you, little youths, because ye have known the Father:

I did write to you, fathers, because ye have known him who is from the beginning; I did write to you, young men, because ye are strong, and the word of God in you doth remain, and ye have overcome the evil.

not as Cain -- of the evil one he was, and he did slay his brother, and wherefore did he slay him? because his works were evil, and those of his brother righteous.

We have known that every one who hath been begotten of God doth not sin, but he who was begotten of God doth keep himself, and the evil one doth not touch him;

we have known that of God we are, and the whole world in the evil doth lie;