The Delphic Oracle has been one of the earliest recorded classics to have narrated the prophetic abilities of a psychic.
The priestess in concern has been The Pythia who lived across the Oracle Apollo at Delphi.
It has been recorded that Pythia would deliver oracles while in a state of immense frenzy, channeling all forms of information that would initially sound like gibberish.
But later Italian and French-speaking priests reshaped her channeling making them presentable to the crowd.
The success of the high priestess have been all really lucky and amazing works out of her association released to be of help to others who followed her.
During rituals at that time her words would be interpreted and followed as they would always be correct to the end.
The vestiges of her words and messages got recorded in classical Greek literature of her contemporary times to be referred to and used accordingly.
Many scholars have researched into the nature of Pythia and her readings.
Many have attributed her readings to be direct channeling and what some got as "gibberish" was actually the energetic transmission and frenzied way of relating the messages.
So her readings were actually highly charged and perfectly intelligible, nowhere being misleading in most cases.
It has also been recorded that she delivered her oracles through enigmatic prophecies at times and it was from her powerful standing that many women rose up to become high priestesses with their metaphysical powers and abilities to be state seers.
One of the final recorded readings or delivery of messages was given by Pythia in 393 AD when the emperor Theodosius I went on stop the functioning of pagan temples.
Many researchers have felt that Pythia would get stimulated to function in the presence of ethylene gas.