We are writing to you about these things, so that [together] our joy may be [completely] full.

If we claim to share a relationship with God and yet live in darkness [i.e., in a sinful way], we are lying and are not living a truthful life.

If we claim to have no sinful practices [in our lives], we are self-deceived and are not being truthful about the matter.

If we claim that we have not committed sins, we are [in effect] calling God a liar [i.e., because He says we have] and His word [i.e., the real truth about the matter] is not in our hearts.

And He is the One who provides a "covering over" [or atonement] for our sins [See Heb. 2:17; Dan. 9:24; II Chron. 29:24], and not for ours [who are already Christians] only, but also for the sins of the people of the whole world.

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.

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:

I have written to you little children [i.e., dear ones], because you have known the Father [as your God]. I have written to you fathers, because you have known Him [i.e., Christ], [who has existed] from the beginning. [See verse 13]. I have written to you young men, because you are [spiritually] strong and the word of God continues to live in your hearts, and you have overcome the [power of the] evil one [See verse 13].

You should not love the [godless] world, nor the things [i.e., the materialistic values] that are part of this [present] age. If any person loves the world, a [genuine] love for the Father is not in his heart.

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.

I did not write to you people because you are ignorant of the truth [about these matters], but because you do know it, and because nothing false belongs to the true teaching.

I have written these things to you people concerning those who are trying to lead you astray [from the truth].

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!

And this is how we will know that we are following [God's] truth, and will have assurance [of it] in our hearts and before God [as well].

Loved ones, if our hearts do not condemn us [i.e., because we are showing love by helping the needy], we can have boldness before God [in prayer for our own needs];

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.

Loved ones, do not believe [the message of] every spirit [i.e., every person claiming to be a teacher], but test the spirits [i.e., require proof that they and their message are genuine] to see whether they represent God [or not], because many false prophets have begun circulating throughout the world.

[But], you people are [followers] of God, little children [i.e., dear ones], and you have overcome them [i.e., these false teachers] because He who is in your lives [i.e., the Holy Spirit, See 3:24] is greater [i.e., more powerful] than he who is in [i.e., dominates] the world [i.e., Satan. See II Cor. 4:4].

These [false teachers] are part of the world, so [naturally] they speak [a message endorsed] by the world and the world listens to them.

And we [apostles] have seen and are [reliable] witnesses that the Father has sent the Son to be the Savior of the world [See 1:2; 2:2].

For there are three who give their testimony [about Jesus]:

If we [are willing to] accept the testimony of people about matters, [surely we ought to accept that] the testimony of God is more reliable; because the testimony of God is that He has presented [confirming] testimony concerning [the identity and mission of] His Son.

We [also] know that we are [children] of God and that the people of the whole world lie under [the control of] the evil one [i.e., Satan].

And [in addition], we know that the Son of God has come [in a physical body, See 4:2] and has given us understanding, so that we can know the True One [i.e., God], and that we are in [fellowship with] the True One, even His Son Jesus Christ. This Son is the true God and eternal life.