en_tn/rom/11/20.md

their ... they

The pronouns "their" and "they" refer to the Jewish people who did not believe.

but you stand firm because of your faith

Paul speaks of the Gentile believers remaining faithful as if they were standing firm and no one could move them. Alternate translation: "but you remain because of your faith" (See: rc://en/ta/man/jit/figs-metaphor)

be arrogant in your thoughts

"think that you are better than you are" or "be proud"