How do we know Jesus Christ was born of promise?

In the sermon, it is noted that both Samson and Jesus were births of promise, as both were granted by God through miraculous means. Samson's birth was announced by the angel of the Lord, a pre-incarnate manifestation of Christ, echoing God's promise of deliverance. Similarly, Christ was born of a virgin through the Holy Spirit, fulfilling the prophecy of Isaiah and affirming God's commitment to save His people. The narratives interconnect, revealing God's sovereign plan to enact salvation through individuals designated for such a purpose.