Law Fulfilled -- Love Perfected

"Herein is our love made perfect, that we may have boldness in the day of judgment: because as he is, so are we in this world." (1 John 4: 17)

Our love is made perfect because Jesus has made us sons of God in Him.

Let's start with the love:

"Herein is love, not that we loved God, but that he loved us, and sent his Son to be the propitiation for our sins." (1 John 4: 10)

This love not only wipes away our sins, and keeps cleansing us from our sins (1 John 1: 7).

This love also transforms us from dead in our trespasses to sons of God:

"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)

In Christ, there is no condemnation (Romans 8: 1), and we are hid in Christ (Colossians 3: 3), therefore, whenever judgment is headed our way, established in righteousness we trust that no weapon will prosper against us (Isaiah 54: 14, 17).

Then we can understand the next verse:

"There is no fear in love; but perfect love casteth out fear: because fear hath torment. He that feareth is not made perfect in love." (1 John 4: 18)

This perfect love surrounds us, provides for us in everyone, but most importantly, has taken away from us the curse of death:

"O death, where is thy sting? O grave, where is thy victory?" (1 Corinthians 15: 55)

This love perfected has perfected us:

"For by one offering he hath perfected for ever them that are sanctified." (Hebrews 10: 14)

This perfection pertains to our conscience:

"How much more shall the blood of Christ, who through the eternal Spirit offered himself without spot to God, purge your conscience from dead works to serve the living God?" (Hebrews 9: 14)

Thus, no matter what judgment may be used against  us, by Satan or mankind, we are free from bondage because in Christ's perfect love, the law has been fulfilled and rendered inoperative against us (Ephesians 2: 13-15)