So Eurystheus became king in Mycene, and the
later-born Hercules remained inferior to
Eurystheus watched with anxiety the rising
fame of his young relative, and called his
subject to him, demanding that he carry
through certain great tasks or labors. When
Hercules did not immediately obey, Jupiter
himself sent word to him that he should
fulfill his service to the King of Greece.
Nevertheless the hero son of a god could not
make up his mind easily to render service to
a mere mortal. So he traveled to Delphi and
questioned the oracle as to what he should
do. This was the answer:
"The overlordship of Eurystheus will be
qualified on condition that Hercules perform
ten labors that Eurystheus shall assign him.
When this is done, Hercules shall be
numbered among the immortal gods."
Hercules fell into deep trouble. To serve a
man of less importance than himself hurt his
dignity and self-esteem; but Jupiter would
not listen to his complaints.