Look at how great a love the Father has given us, that we should be called God's children. And we are! The reason the world does not know us is that it didn't know Him.
References for 1 John 3:1
Dear friends, we are God's children now, and what we will be has not yet been revealed. We know that when He appears, we will be like Him, because we will see Him as He is.
And everyone who has this hope in Him purifies himself just as He is pure.
Everyone who commits sin also breaks the law; sin is the breaking of law.
References for 1 John 3:4
You know that He was revealed so that He might take away sins, and there is no sin in Him.
References for 1 John 3:5
Everyone who remains in Him does not sin; everyone who sins has not seen Him or known Him.
Little children, let no one deceive you! The one who does what is right is righteous, just as He is righteous.