Why Did Jesus Come Into the World?

Desiring God:

For I tell you that Christ became a servant to the circumcised to show God's truthfulness, in order to confirm the promises given to the patriarchs, and in order that the Gentiles might glorify God for his mercy. As it is written,

“Therefore I will praise you among the Gentiles,
and sing to your name.” (Romans 15:8-9)