The divine is immanent in the universe. Immanence is the pervasion of the universe by the divine or, if you prefer, by the intelligent and creative principle or force. In pantheism no separate deities are needed to represent the divine. It is already in us, and in the world in which we live. It is ourselves to whom we speak as much as the rest of nature.
Pantheism requires no ceremonies to entreat or propitiate such deities.
We do not need the detailed traditions of Wicca or the complex rituals of Ceremonial Magick. It is a belief to which one comes on one's personal path, through experience, feeling and perhaps study. For all its advantages, this approach has one disadvantage. One approach is to say simply that anyone who describes themself as a pantheist is one. Many pagan pantheists in particular take this view.