That is correct: They were broken off because of unbelief, but you stand by faith. Do not be arrogant, but be afraid.
Καλῶς· τῇ ἀπιστίᾳ ἐξεκλάσθησαν, σὺ δὲ τῇ πίστει ἕστηκας. Μὴ ὑψηλοφρόνει, ἀλλὰ φοβοῦ·