In monotheistic thought, God is conceived of as the supreme being, creator deity, and principal object of faith. God is usually conceived as being omniscient (all-knowing), omnipotent (all-powerful), omnipresent (all-present) and as having an eternal and necessary existence. These attributes are used either in way of analogy or are taken literally. God is most often held to be incorporeal (immaterial). Incorporeality and corporeality of God are related to conceptions of transcendence (being outside nature) and immanence (being in nature) of God, with positions of synthesis such as the 'immanent transcendence'.

A devil is the personification of evil as it is conceived in many and various cultures and religious traditions. It is seen as the objectification of a hostile and destructive force.
It is difficult to specify a particular definition of any complexity that will cover all of the traditions, beyond that it is a manifestation of evil. It is meaningful to consider the devil through the lens of each of the cultures and religions that have the devil as part of their mythos.