In Greek Mythology, Tiresias was a blind prophet of Thebes, famous for being transformed into a woman for 7 years. Tiresias participated in seven full generations at Thebes and was an advisor to Cadmus himself. Tiresias was also a prophet of Apollo. He always tells the truth about the past, present and future - but the characters who need to pay attention are too distracted to listen and often realise too late that what the blind old man was saying was actually true to their situation.