How do we know salvation is only for the elect?

The New Testament teaches that Jesus took on the nature of humanity specifically to redeem the seed of Abraham, which represents God's chosen people. His sacrifice was not for angels or the entirety of mankind but for those whom the Father gave Him before the foundation of the world. This vital distinction emphasizes the doctrine of election in the gospel, where all men are rooted in Adam's fall, yet not all are chosen for salvation. Thus, universal salvation contradicts God's sovereign purpose.