How do we know God's purpose for Christ's coming is true?

The assurance of God's purpose in sending Christ stems from biblical revelation. Ephesians 1:4 states that God chose those whom He would save before the foundation of the world, indicating that Christ's coming was not a reaction to humanity's sin but rather an essential part of God's eternal plan. This aligns with the overarching narrative of Scripture, which consistently affirms that salvation is orchestrated by God's sovereign grace, revealing His divine prerogative in the redemption of His elect.