Here mercy means God's undeserved blessings. AT: "because the Jews have rejected Jesus, you have received blessings that you did not deserve" (See: [[rc://en/ta/man/translate/figs-explicit]])
God has treated people who disobey him like prisoners who are unable to escape from prison. AT: "God has made prisoners of those who disobey him. Now they cannot stop disobeying God" (See: [[rc://en/ta/man/translate/figs-metaphor]])