How do we know God chose His people before creation?

Ephesians 1:4-5 clearly states that God chose us in Christ before the foundation of the world, signifying His sovereign grace in the plan of salvation. This choice was made not based on any foreseen merit but solely out of His mercy and purpose. The implication is profound: God's design for redemption was established before creation, as part of His ordained plan to glorify His grace. This doctrine assures believers that their salvation is rooted in God's eternal purpose and not contingent on their actions.