Romans 3:3

3:3 What then? If some did not believe, does their unbelief nullify the faithfulness of God?

Romans 4:14

4:14 For if they become heirs by the law, faith is empty and the promise is nullified.

Romans 6:8

6:8 Now if we died with Christ, we believe that we will also live with him.

Romans 11:14

11:14 if somehow I could provoke my people to jealousy and save some of them.

Romans 11:21

11:21 For if God did not spare the natural branches, perhaps he will not spare you.

Romans 12:18

12:18 If possible, so far as it depends on you, live peaceably with all people.