When Scripture speaks of doing good to our enemies, it is focusing on the common, everyday interactions that we have with other people. This teaching is less applicable in cases of physical violence or wars between nations, although even seeking justice is a form of love and kindness in that it may keep an offender from sinning even further. In any case, we should love those who hate us, pray for them, and seek their well-being.
Is the fruit of self-control manifesting itself in your life? Do you lose your temper often, or are you able to control your emotions? Take some time to look at the relationships in your life to see whether you are exercising self-control. Ask God to grant you the wisdom to understand how you might better control yourself in all situations.