In this chapter, we take a step back and consider a range of underlying concepts and metaphors that express something of what it means to participate, in or from another, and particularly to participate in or from God. 'Part of' language is found to have little value, while the idea of 'part in' is more promising. Notions of a limited reception from another have also been significant, as has the language of likeness. Two approaches are found to be particularly valuable: the idea of reception from a boundless source according to the distinct mode of being of the recipient, and the relation of source to recipient that is indicated by causation.