EDITORIALAs we identify the underlying themes of articles in this issue of Religion, State and Society, it may seem a bit peculiar to invoke the New Testament adage 'Render unto Caesar the things that are Caesar's, and unto God the things that are God's'. Yet, although these contributions present quite different cases -the International Society for Krishna Consciousness (ISKCON) in India, Iglesia ni Cristo (INC) in the Philippines and the Russian Orthodox Church Moscow Patriarchate (ROC MP) in Russia and China -in one way or another, they all tell the story of how religions' attempts to make a difference in their respective societies engage them in power relations that, ultimately, are regulated by the state and its agencies. These articles thus make valuable contributions to the theme of religious diversity and its management by the state, which is of paramount importance for understanding changes in contemporary religions and societies. From this perspective, issues of religious diversity are not simply about the coexistence of various religious phenomena within given societies but about the whole gamut of the ways in which people motivated by beliefs, values and affiliations work through social conventions, regulations and structures to reshape their lives and those of others. Such issues are also about the indirect and unintended effects that these efforts can yield.The first two papers, by Samta P. Pandya and Jayeel Serrano Cornelio, follow the trajectories of two religious movements that play an increasingly prominent role in public services. While motivated by their devotional callings, their members also become involved in national politics and relationships with the state that can pose questions about the integrity of their original theologies and the motives of their leaders. While at their inception, these movements, ISKCON in India and INC in the Philippines, raised controversies around their beliefs, practices and memberships, their eventual highprofile public service gained them social acceptability and respect. Yet this newly acquired social capital and respectability would, ironically, provide new opportunities for their leaderships to engage in mainstream politics in problematic ways: in the form of new nationalism in the case of ISKCON in India or in a triumphalist assertiveness in the case of the INC leadership in the Philippines.These articles can enliven current debates about the place and role of 'faith-based' organisations and, more broadly, about the role of religion in contemporary societies by calling us to look with a more discerning eye into religious motivations for civic engagement (Dinham 2009;Bretherton 2011) and the ways these motivations are shaped, modified and aligned with political contingencies and expediencies (Beckford 2012;Hjelm 2014). Pandya points out the significance of theological roots and devotional impetuses in the Krishna devotees' impressive work for the Food for Life programme in India (and elsewhere in the world, we might add) while also drawing