Pastor Jamie Self's sermon at Grace Church in Peoria focuses on Matthew 7:1-12, part of the Sermon on the Mount. He emphasizes that Jesus calls us to judge others not in condemnation but with love and humility, recognizing our own sinfulness and need for grace. Pastor Jamie explains that the key to loving others rightly is seeing clearly—first seeing God, then ourselves, and finally others—so that we can approach our relationships and judgments with compassion and care, rather than hypocrisy or self-righteousness.