Jesus Christ
Behold, what manner of love the Father hath bestowed upon us, that we should be called the sons of God: therefore the world knoweth us not, because it knew him not. 1 John 3:1
The world that did not recognize Jesus does not recognize His disciples either. The 'him' the world did not know is the Son, as John wrote in his Gospel.
How we know: the chapter heading names Him
- alludes to John 1:10-12 — the world knew him not; those who received him become the sons of God
