How do we know that God predestines individuals for salvation?

Scripture clearly affirms the doctrine of predestination, particularly in Ephesians 1:4-5, which states, 'According as he has chosen us in him before the foundation of the world, that we should be holy and without blame before him in love: Having predestinated us unto the adoption of children by Jesus Christ to himself according to the good pleasure of his will.' This indicates that God's election is based not on human actions or decisions but on His divine will and purpose. The concept of predestination assures believers that their salvation is secure and planned by God's sovereign will from eternity past, highlighting the depth of His grace.