We declare to you what we have seen and heard [concerning Christ], so that you also may share a relationship with us. And indeed, our fellowship is with the Father and with His Son Jesus Christ.

And here is how we can be assured that we know Jesus [i.e., that we are saved]: [It is] by obeying what He commands us.

The person who says, "I have come to know Him," but does not obey what He commands, is lying [by such a profession], and the truth [about the matter] is not in his heart.

But the person who obeys what His teaching requires, truly in this person love for God has been made complete. This is [another way] to be sure that we are in [fellowship with] Him:

For all that makes up the world, namely, the improper desires of the physical body, the improper desires for what is seen, and the [boastful] pride over life's possessions; these are not from the Father, but from the [godless] world.

And the world, with its [physical and material] desires, is passing away, but the person who does what God wants will continue to live forever.

You people should continue [to practice] what you heard from the beginning [i.e., to love one another, See verses 7-11]. If you do, then you also will continue in [fellowship with] the Son, and with the Father.

And this is important to you: The "special gift," which you received from God [See verse 20], continues to live in your hearts, [so that] you do not need anyone to teach you [anything different]. But, since this same "special gift" teaches you concerning everything that is true, and [what it teaches] is not false, you should continue to live in [fellowship with] Christ.

If you know that Christ is [truly] righteous [verse 1], then you should also know that everyone who does what is right has been [spiritually] conceived [and eventually born] by God [See 5:18].

Look at how much love the Father has shown to us [Christians], that we should be called His children! But, that is what we [really] are! The reason the people of the world do not know who we are is because they do not know who God [really] is.

Dearly loved ones, we are God's children now, but it has not yet been revealed [to us] what we will be [in the future life, Luke 20:34-36]. But, we do know this, however, that when Jesus is revealed [i.e., at His second coming], we will be like Him [I Cor. 15:49], for we will see what He really looks like!

Little children [i.e., dear ones], do not allow anyone to lead you astray [from the truth]; the person who continues to do what is right is [considered by God as] righteous, even as Christ is righteous.

Here is how the children of God and the children of the devil can be recognized: All those who do not continue to do what is right do not belong to God. Also, the person who does not continue to love his brother [or sister does not belong to God].

Here is how we can know what genuine love really is: It was [demonstrated by] Jesus laying down His life [on the cross] for us. And [because of that] we [too] should [be willing to] lay down our lives for [the sake of helping] our brothers [and sisters].

Little children [i.e., dear ones], we should not [merely] claim to love [people], or [even just] talk about it, but [we should love] by what we do [for them] in a genuine way.

and we can be assured of receiving from God whatever we ask Him for, because we are obeying His commands [i.e., especially the one about loving others] and are practicing what is pleasing to Him.

Here is what a complete love will do for us: It will give us boldness in [facing] the judgment day, because the way Jesus acts [regarding love] is the way we should act [while] in this world.

This is [one] way we know that we love God's [spiritually reborn] children: [It is] when we love God and obey what He commands us to do.

For this is [real evidence of] our love for God: [It is] obeying what He commands us to do. And obeying His commands does not cause us any grief [or, unpleasantness].

The person who [sincerely] believes in God's Son has the evidence [of it] within his heart, [confirming God's testimony]. The person who does not believe God [i.e., what He says about Jesus], accuses Him of lying, because he has not accepted the [irrefutable] testimony of God concerning [the identity and mission of] His Son.