1 John 5:18 & 19

"We know that anyone born of God does not continue to sin; the one who was born of God keeps him safe, and the evil one cannot harm him. We know that we are children of God, and that the whole world is under the control of the evil one." NIV translation

God forgives our sins and if we are truly His children we are not controlled by the sinful nature.

Jesus is the one who protects us and keeps us for eternity. We are His children and not children of the world which is controlled by Satan.

1 John 5:20 & 21

"We know also that the Son of God has come and has given us understanding, so that we may know him who is true. And we are in him who is true - even in his Son Jesus Christ. He is the true God and eternal life. Dear children, keep yourselves from idols." NIV translation

Jesus came and gave us wisdom and a counselor (the Holy Spirit) so that we may understand the things of God. This understanding of the nature of God compels us to stay away from false gods and idolatry.