Paris Reidhead's sermon 'Uplifted Gates' addresses the hindrances in a Christian's life caused by sin, emphasizing the importance of understanding sin, its consequences, and the path to restoration with God. He explains that sin is the decision to gratify a good appetite in a bad way, leading to broken fellowship with God, unanswered prayers, and exposure to spiritual attacks. Reidhead outlines a three-step process for restoration: judging oneself, forsaking sin, and confessing it to God. He highlights that true revival begins with brokenness and humility before God, as demonstrated in the Hebrides revival. Ultimately, Reidhead calls for a return to a pure heart and a commitment to living in fellowship with God.