问答题

简答题 ’...What though the field be lost？All is not lost；the unconquerable will，And study of revenge，immortal hate，And courage never to submit or yield，And what is else not to be overcome；That glory never shall his wrath or might Extort from me.To bow or sue for grace With suppliant knee，and deify his power，Who，from the terror of his arm，so late Doubted his empire，that were low indeed，That were an ignominy and shame beneath This downfall Questions：
The quotation is from Milton s masterpiece，what is it？What are the artistic features of the author？