ANSWER: (a) "God is said alone to have immortality, because he has it not from another's will, as other immortals have, but from his own essence" (Justin Martyr), "underived, independent immortality" (Wesley's note). (b) This is quoted from a chapter in which the future destiny of the righteous only is described. Paul believed in the resurrection of the unjust (Acts 24:15), as did Daniel in 12:2, and as Christ asserted in John 5:29. But Paul had no occasion to discuss the future of the unjust in this passage. Hence this omission does not disprove their endless existence. Study "eternal punishment" in Matt. 25:46 and Rev. 20:10, where two men "shall be tormented day and night forever and ever."
— From Steele's Answers pp. 31, 32.