How do we know the doctrine of predestination is true?

The doctrine of predestination posits that before the foundation of the world, God chose certain individuals for salvation through His grace. Ephesians 1:4-5 clearly outlines this teaching, affirming that we were chosen in Christ to be holy and blameless. This doctrine is supported by various passages throughout the New Testament, including Romans 8:29-30, which explains how God's foreknowledge and predestining are integral to His plan of salvation. Understanding predestination is crucial for believers, as it underscores the assurance Christians have in their salvation, originating solely from God's sovereign will and purpose rather than human effort or merit.