Beloved, let us love one another, for love is (springs) from God; and he who loves [his fellowmen] is begotten (born) of God and is coming [progressively] to know and understand God [to perceive and recognize and get a better and clearer knowledge of Him]. 8 He who does not love has not become acquainted with God [does not and never did know Him], for God is love. 

1 John 4:7-8 AMP

 

God is love and only those who really know God have His agape love flowing out of them. 

 

In this the love of God was made manifest (displayed) where we are concerned: in that God sent His Son, the only begotten or unique [Son], into the world so that we might live through Him. 10 In this is love: not that we loved God, but that He loved us and sent His Son to be the propitiation (the atoning sacrifice) for our sins.  1 John 4:9-10 AMP

 

God clearly demonstrated His deep love toward us when He sent His only begotten Son to die so that we might live.

 

Beloved, if God loved us so [very much], we also ought to love one another. 12 No man has at any time [yet] seen God. But if we love one another, God abides (lives and remains) in us and His love (that love which is essentially His) is brought to completion (to its full maturity, runs its full course, is perfected) in us!  1 John 4:11-12 AMP

 

If God loves us so much, then we ought to also love each other. Even though we cannot see God, we can walk in His love and His love can become fully developed and mature within us.

 

By this we come to know (perceive, recognize, and understand) that we abide (live and remain) in Him and He in us: because He has given (imparted) to us of His [Holy] Spirit. 14 And [besides] we ourselves have seen (have deliberately and steadfastly contemplated) and bear witness that the Father has sent the Son [as the] Savior of the world. 15 Anyone who confesses (acknowledges, owns) that Jesus is the Son of God, God abides (lives, makes His home) in him and he [abides, lives, makes his home] in God.

1 John 4:13-15 AMP

God makes His home in you and you make your home in Him when you accept Jesus as your Lord and Savior.

 

And we know (understand, recognize, are conscious of, by observation and by experience) and believe (adhere to and put faith in and rely on) the love God cherishes for us. God is love, and he who dwells and continues in love dwells and continues in God, and God dwells and continues in him.  1 John 4:16 AMP

 

We know that God loves us because He says so in His Word and because we have experienced His love. If we want to continue to live in Him and He in us, we must continue to walk in love.

 

In this [union and communion with Him] love is brought to completion and attains perfection with us, that we may have confidence for the day of judgment [with assurance and boldness to face Him], because as He is, so are we in this world. 18 There is no fear in love [dread does not exist], but full-grown (complete, perfect) love turns fear out of doors and expels every trace of terror! For fear brings with it the thought of punishment, and [so] he who is afraid has not reached the full maturity of love [is not yet grown into love’s complete perfection].  1 John 4:17-18 AMP

 

As we continue to walk with God and as we continue to allow Him to work in our hearts, then love is brought into completion in us, because as He is, so are we in this world. We can then come boldly into His presence, with no fear of punishment, because we are confident of the love that God has for us.

We love Him, because He first loved us.  1 John 4:19 AMP

 

We love him because we know how much He loves us. He reached out to love us first, before we knew Him or anything about Him at all.

 

If anyone says, I love God, and hates (detests, abominates) his brother [in Christ], he is a liar; for he who does not love his brother, whom he has seen, cannot love God, Whom he has not seen. 21 And this command (charge, order, injunction) we have from Him: that he who loves God shall love his brother [believer] also.  1 John 4:20-21 AMP

 

God commands us to love our brothers and sisters. The most compelling proof that we love God is that we love our brothers and sisters as well. If we say we love God and yet we do not love our neighbor, then we are lying – we do not really love God at all.