'Evil One' in the Bible

When any one hears the word of the kingdom and does not understand it, the evil one comes and takes away the seed sown in his heart. This is he that received seed by the way.

I write to you, fathers, because you have known him that is from the beginning. I write to you, young men, because you have overcome the evil one. I wrote to you, little children, because you have known the Father.

I wrote to you, fathers, because you have known him that is from the beginning. I wrote to you, young men, because you are strong, and the word of God continues in you, and you have overcome the evil one.

not as Cain was of the evil one and killed his brother; and why did he kill him? because his works were evil, and his brother's righteous.

We know that every one who has been born of God does not sin, but he that has been born of God keeps himself, and the evil one does not touch him.