Chuck Smith emphasizes God's faithfulness in fulfilling His promises, as seen in the birth of Isaac to Abraham and Sarah despite their old age. He highlights the significance of Abraham's obedience when tested by God to sacrifice Isaac, illustrating the deep love and trust between them. The sermon also reflects on the importance of recognizing God's provision and the foreshadowing of Christ's sacrifice in Abraham's actions. Smith draws parallels between the covenant made with Abraham and the promise of salvation through Jesus, underscoring the theme of faith and divine provision throughout the narrative.