1 John 4:7-10

Beloved, we might love, because love is from God, and everyone who loves has been begotten from God and is knows God. ⁸ Everyone who does not love is not known by God because God is love.⁹ In this the love of God is manifested in our case, because God sent His only son into the world in order that we might come to live through him. In this is love, not that we have loved God but that he has loved us and sent His son as a propitiation for our sins. (My translation)

John continues to drive home that love and the Christian's life are together as one. Verse 7 gives the substance of our own love. Those that are in Christ love because God loved them. His is the one that gives us love. Also notice that love characterizes the one that is "begotten" and "knows" God. This relates to John 14, where Jesus mentions that love for him is equal to obeying Him. The action of loving others identifies one as a Christian. Private devotion does not shows one to be a Christian. This is not to neglect these things because that is what God uses to help Christians grow in love. The negation in verse 8 just repeats what is said in verse 7.
Lets not move to quickly past this. The way we act towards others show much. In Lane and Tripp's book, "How People Change," they explain that how people react in situations reveal their hearts. Other people and situations do not case a person to act in certain ways. As Christians, when we act in a not loving way it reflects bad on the goodness and love of God. Now, this is not a excuse for those that do not believe. A life that is characterize as not loving shows that they are not really from God. This is noticed in the difference in verse 7 and 8. The verb "knows" and "known" are the same verb is different tenses. For the sake of simplicity, the first is present and the second is past tense. This difference in the tenses show a great deal. It is the difference is one knowing God and the other never knowing God.
Finally verses 9  and 10 starts with a common phrase in 1 John, "in this." John uses this phrase to connect different arguments. It is used 14 times in 1 John and it means from this past information this next set of information is also true. So here,  John is saying that we know this love of God because of He sent His son on earth. This was done so that Christians can have life. Verse 10 then gives us an explanation of this, using "in this." God's love is demonstrated in the sacrifice of Jesus as a "propitiation for our sins."
What does this mean for our life? We love as a continuation of His love to us. Our love reflects the love of Christ. This love is based on the new life that we have in Christ. Christ who acted loving all the time, is our example of what love looks like. It is not a self-seeking love but a love of others. Christian life is not about me but about Christ. As we learn more about God, it should cause us to love others more than self. It is seeing Christ as the one that bore our sin and then living accordingly to others. Love is not seeking revenge for sins committed against us but forgiving others. Love seeks to bring life and forgiveness restores the broken life we have with others. 

1 John 3:1

See what great love the Father has lavished on 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.

Our circumstances don't cause us to act as we do. They only expose or true condition of our hearts, revealed in our words and actions." Lane/ Tripp's book How People Change.

Mediation for the day.

In my Greek class, we are working through 1 John. I started reading it more throughly from the Greek. I was in 1 John 3:14. The ESV reads, "We know that we have passed out of death into life, because we love the brothers. Whoever does not love abides in death."

The last part the verse struck me. I translated the Greek, "He who loves not remains in death."He remains there because he has not crossed over, or as the ESV reads pass over, from death. The one who does not love is still in their sins. Verse 15 confines the thought with "everyone who hates their brother is a murder." This connects hate with Cain. Those that hate are like Cain. This is a powerful statement and one that we should not pass by to quickly. As Christians, the way we treat other Christians show our devotion to God.
In what ways to we hate each other? This could be as simple was trying to be better then a fellow members. It could be seen as easily as not helping when someone is in need. Remember of you have hated, Jesus stands to forgive you (1 John 2:2).