Divination it is the art of predicting the future, and it has existed in all cultures.
The ancient Greeks are one of the most superstitious peoples and believers in divination. Such was the power that divination wielded in the life of the Ancient Greece, which governed personal life but also official life.
The fortune teller was called mantis and mantiké divination. The diviners were usually the priests or priestesses. Divination was almost always performed in a temple where the priestess through different methods entered a special state and communicated with the gods.
Divination might be intuitive, but they also knew the induced or artificial divination, which was carried out by observing different elements called semeia, they also observed nature, atmospheric, acoustic, physiological phenomena, the flight of birds and others.
The viscera of the animals were checked, especially the liver, paying special attention to the appearance of the lobes, the gallbladder and the portal vein.
Divination was also carried out through dreams. In the Iliad the importance that the Greeks gave to divination was already mentioned.
The man of Greek antiquity like the one of all times wants to know the present and the future. People asked questions they wanted to know, and the authorities before starting any task such as going to war or participating in an event first consulted fortune-tellers. In other words, the soothsayers had great power since nothing was started without the gods' approval of the project and the only ones who could interpret what the gods were saying were the soothsayers.
When they were ill, amulets that had been constructed under special effects and constellations were hung around their necks.