"the greatest deity the world has ever known"
Crucifixion by Velazquez
Public DomainCrucifixion by Velazquez

This prophecy by Thrasyllus (an invention by Graves) is Delphic. Livia assumes that the prophecy relates to herself (that she will become the greatest Deity the world has ever known) whereas we can see, with the benefit of hindsight, that it relates to Jesus Christ.