Roma 11:19-21

11:19 Then you will say, “The branches were broken off so that I could be grafted in.” 11:20 Granted! ¹  They were broken off because of their unbelief, but you stand by faith. Do not be arrogant, but fear! 11:21 For if God did not spare the natural branches, perhaps he will not spare you.

[11:20]  ¹ tn Grk “well!”, an adverb used to affirm a statement. It means “very well,” “you are correct.”