The heart is our core self, determining how we interact with the world. Jesus commands us to love others as He loved us, yet we often fall short, judging people based on our moods or preconceptions. The contrast between a heart at war and a heart at peace is stark - one sees others as objects or problems, while the other recognizes their humanity despite flaws. Moving from war to peace requires recognizing our choice, inviting God's help, following Jesus's example, and practicing patience with ourselves. This transformation isn't about others deserving our compassion, but about becoming who God created us to be.