How do we know that God sent His Son to redeem us?

The certainty of God's sending His Son for our redemption is rooted in the authority of scripture, particularly in Galatians 4:4-5. These verses affirm that when the fullness of time had come, God sent forth His Son, made under the law, to redeem those who were under the law. This act of sending is not merely a historical event, but part of God's eternal plan for salvation. Furthermore, it highlights God's initiative in our salvation, as we did not seek Him, but in His grace, He sought us out, fulfilling His promise to redeem His people through Christ's perfect obedience and sacrificial death.