Charles Swindoll preaches on the profound impact of experiencing relief, highlighting how God, as the author of relief, grants us peace, satisfaction, and ease through His mercy. Swindoll emphasizes that mercy is our ultimate source of relief, demonstrating God's active compassion towards both offenders and victims. He delves into various biblical examples where God's mercy brought relief to those suffering from unfair treatment, grief, handicaps, suffering, and guilt, showcasing how mercy mysteriously takes away the anguish in our lives. Swindoll urges believers to remember their undeserving nature before Christ to fully appreciate and frequent the gate of mercy.