1 John 3:1

Behold what manner of love the Father has given to us, that we should be called children of God. And that is what we are! The reason the world does not know us is that it did not know Him.

2 Beloved, we are now children of God, and what we will be has not yet been revealed. We know that when Christ appears, we will be like Him, for we will see Him as He is.

3 And everyone who has this hope in Him purifies himself, just as Christ is pure.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
Behold what manner of love the Father has given to us, that we should be called children of God. And that is what we are! The reason the world does not know us is that it did not know Him.
KJV
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.
WEB
See how great a love the Father has given to us, that we should be called children of God! For this cause the world doesn’t know us, because it didn’t know him.
ASV
Behold what manner of love the Father hath bestowed upon us, that we should be called children of God; and [such] we are. For this cause the world knoweth us not, because it knew him not.
DARBY
See what love the Father has given to us, that we should be called [the] children of God. For this reason the world knows us not, because it knew him not.
BLB
See what kind of love the Father has given to us, that we should be called children of God—and we are! Because of this, the world does not know us, because it did not know Him.
ÅB
Se, hvor stor kjærlighet Faren har vist oss, at vi skal kalles Guds barn; og det er vi. Derfor kjenner verden ikke oss fordi den ikke kjenner ham.
OTB
Se hvilken underfull kjærlighet Faderen har gitt oss, at vi skal kalles Guds barn; og det er vi virkelig. Dette er grunnen til at verden ikke gjenkjenner oss: fordi den ikke gjenkjente Ham.
B1930
Se, hvor stor kjærlighet Faderen har vist oss, at vi skal kalles Guds barn; og det er vi. Derfor kjenner verden ikke oss fordi den ikke kjenner ham.

Study notes (Tyndale)

Original text and word study

Cross references