I love the New Testament passages that describe the church in terms of stones. Peter says Christians are “like living stones” who are “being built up as a spiritual house, to be a holy priesthood” (1 Peter 2:5), with Christ as the cornerstone (2:6-7). Paul says similar things in Ephesians 2:19-22
The following 21 challenges are in no particular order and are by no means exhaustive, and they are largely (but not exclusively) reflective of an American evangelical context. I also should note that each of them represents not only a challenge but also an opportunity. The church has historically thrived when she is tested rather than comfortable.
I wrote an article recently for Biola Magazine, the official publication of Biola University, about the challenges Christian universities are facing on "religious freedom" issues related to changing cultural norms--particularly around gender and sexual orientation--and their accompanying legal protections. What happens when an individual (student, staff or faculty member) decides they want to join a community like Biola but live in a manner that is inconsistent with the institution's convictions?