" First, this means there is no one, single way to express the Christian faith that is universal for everyone in all cultures. As soon as you express the gospel, you are unavoidably doing it in a way that is more understandable and accessible for people in some cultures and less so for others. On the other hand, while there is no culture-transcending way to express the truths of the gospel, there is nonetheless only one true gospel. The truths of the gospel are not the products of any culture, and they stand in judgment over all human cultures. If you forget the first truth — that there is no culture-less presentation of the gospel — you will think there is only one true way to communicate it, and you are on your way to a rigid, culturally bound conservatism. If you forget the second truth — that there is only one true gospel — you may fall into relativism, which will lead to a rudderless liberalism. Either way, you will be less faithful and less fruitful in ministry. "

― Timothy J. Keller , Center Church: Doing Balanced, Gospel-Centered Ministry in Your City