He gave Odysseus a prophecy of what he had to do when he got back to Ithaca, and gave him proper guidance on how to achieve these goals.
Odysseus would like the blind prophet Teiresias to tell him how to get home safely.
Teiresias tells Odysseus to avoid the herds of Helios cattle on Thrinakia. Teiresisas saw that if Odysseus and men ate the cattle it would bring about their destruction.
Teiresias
Odysseus slits the throat of a large black sheep and lets Teiresias drink of its blood.
Teiresias does no such thing. He tells Odysseus all he needs to know.
Teiresias says Odysseus will take his revenge on these suitors and eventually kill them all either by through force or fraud.
Teiresias
Eat The Halios' Cattle
Odysseus speaks with the Theban prophet Tiresias, who tells Odysseus how to get home.
Elpenor; comrade of Odysseus. Teiresias; who Odysseus sought in Hades. Antikleia; the mother of Odysseus.
To speak to Teiresias, as Circe advised.
the blind prophet, teiresias