'Sins' in the Bible

If we confess our sins, He is so faithful and just that He forgives us our sins and cleanses us from all unrighteousness.

Dear children, I write thus to you in order that you may not sin. If any one sins, we have an Advocate with the Father--Jesus Christ the righteous;

and He is an atoning sacrifice for our sins, and not for ours only, but also for the sins of the whole world.

I am writing to you, dear children, because for His sake your sins are forgiven you.

And you know that He appeared in order to take away sins; and in Him there is no sin.

This is love indeed--we did not love God, but He loved us and sent His Son to be an atoning sacrifice for our sins.