How do we know God's elect are chosen before the foundation of the world?

In the historic Reformed perspective, the doctrine of election affirms that God chose certain individuals to be saved before the creation of the world. This is rooted in passages like Ephesians 1:4-5, which states that He chose us in Him before the foundation of the world for His purposes. This selection is not based on foreseen faith or actions but is according to His sovereign grace and mercy. Therefore, while we do not know who God's elect are, the gospel call is extended to all, and it is God who knows and saves His people according to His divine plan.