John Gill expounds on 1 Peter 1:20, emphasizing that Christ was foreordained by God not just in prescience but with a deep, affectionate love as the Mediator. This foreknowledge includes the divine choice of Christ as the sacrificial Lamb, set apart before the foundation of the world for the redemption of His people. Gill highlights that God's plan for redemption was established eternally, independent of human actions, showcasing His sovereign grace and everlasting love. The manifestation of Christ in human form was a pivotal moment in history, intended for the elect, revealing God's eternal purpose in salvation.