From its emergence during the enlightenment of the 18th century Deism was considered to be a belief in a God seperated from creation: a God who lit the blue touch-paper and then retired to a safe distance as the cosmic firework went off with a big bang.
Comtempory Deism, however, does not limit it definition of God this way. Indeed, it is rather loath to define God at all. Reason, as a human facility, is powerful, but it has limits. It allows people to view nature and discern a divine influence behind a comprehesible universe operating according to laws.
Any meaningful concept of God places the divine as being beyond the limits of human comprehension. Christians often refer to God as ineffable but then contradict themselves by claiming to have revealed knowledge as to His nature: God made manifest to Man.
Deists enbrace the idea of God’s ineffability, otherwise it wouldn’t be God, or at least a God little different from humans. This allows for differing ideas in the Deist community as to what is meant by God.
There are Deists for whom nature shows clear indications of design, which suggests to them a designer whose purpose is being expressed through nature and, thereby, their lives.
For others there is a dynamic, co-creative process in the relationship between the universe and God. As an intelligent element of the universe, humanity plays an active, conscious part in that process.
For some, God is a subtle influence on the cosmos, on their lives, while others are content that God is little more than an observer of the universe as it evolves. And there are still those who adhere to the classical Deist position.
Deism does not, cannot, have a creed as it must accommodate all the varied ideas of those who profess themselves to be Deists. Because God is ineffable there can be no final settlement as to which notions are correct. A person must use his or her reason to decide what best fits with their experience.
If Reason is the foundation of Deism, then Experience and Nature are the basis for the formulation of Deist beliefs. And they must remain beliefs as they cannot be verified as incontrovertible truths. The foundation though, laid down through Reason, is, whatever differences there are between Deists there is a common acceptance of there being God.
This does not imply an anthropomorphic view of God, some enhanced humaniod or a cosmic great architect, a concept closer to Freemasonry than Deism. Declaring God to be ineffable is not an attempt to side step definition, but an acceptance of divine being beyond the limitations of human understanding.
God can be regarded as process, a recognition that the universe is an unfolding expression of divine purpose. It is meaningful at least because humanity finds meaning and most would consider their time purposeful.
Deists make no claims to ultimate truth: if this was possible then Deists would be gods. They can, however, employ reason to appreciate the universe is reasonable which at the very least suggests intelligence is not confined to makind.
That there are differences between Deists is positive, keeping open the discussion and exchange of ideas. It also means there can be no orthodoxy and so, no heresy. Deism does not offer salvation or a supernatural order superior to this world. In fact, it is to this world the Deist looks for spiritual inspiration and for the arena in which life is to be lived, knowledge gained.