We fight and quarrel because we don’t get what we want. We also will start scheming and manipulating a situation to get that thing we desire and lust for. That’s why a lot of people get robbed. And then unfortunately many actually kill so they can get what they are lusting after.
Now we as Christians may not actually kill, but we can harbor hate in our heart. To God, that is murder too. Read Matthew 5:21-22. God is looking at our hearts. If that is us, we need to come to Him for forgiveness. An unforgiving, hateful heart will paralyze us and prevent us from being able to bear fruit for God. We need to ask God for forgiveness. And ask Him for those things we long for.