Divination in her first steps was connected with the Divine. There is no divination without the true connection to the Gods and the unseen powers of the nature. Through their signs (oionoi) the will of the Gods is revealed. The method of catching and explaining these signs is divination.
The first forms of divination concluded with invocations, evocations, magical rituals and the explaining the signs. As years were passing by, those steps became complicated and only a few priests could perform them. The techniques of divination became more and with great details. Knowledge of those techniques and practice are necessary.