Love of and for Him. Something like when you get married...you want to remain faithful to your beloved. You wouldn't want to disappoint or hurt them...because you love them so.
The Bible has a long discription of Love that pretty much says it all. You might want to look it up though I tend to think you have. But a refresher would be worth the read.
( Ist Corinthians chapter 13 beginning with verse 4) Just so you don't have to locate it.
But love lapses. And forgiveness can be asked repeatedly. So, you’re back where you started: You can kill, and ask for forgiveness.
Also, you didn’t answer the second part of what I asked earlier.