As Christians, we are members of both the kingdom of God and a social order of what?

The answer is rooted in the understanding of dual citizenship that Christians hold. As members of the kingdom of God, believers recognize their spiritual and eternal identity as children of God, living according to His kingdom principles and moral guidelines. Simultaneously, Christians live in the current social order of this world, which includes engaging with societal structures, cultural norms, and community responsibilities.

In this context, the phrase "social order of this world" acknowledges that while Christians aspire to live by the values of the kingdom of God, they are also called to interact with and influence the society around them. This interaction is essential for the fulfillment of the Great Commission, where believers are tasked with spreading the teachings of Christ and being lights in their communities.

The other options don't capture this duality as effectively. The afterlife and heaven refer to future states rather than current social engagement. The universe is a broad term that lacks the specific relational and contextual nuances associated with the way Christians are called to live here and now. Thus, the focus on the kingdom of God alongside the social order of this world highlights the active and present responsibility of Christians to embody their faith within their earthly context.