The need for Theology and its goal

In "Fit Bodies Fat Minds, Os Guiness wrote:
the present state of American evangelicalism is appalling. As a spiritually and theologically defined community of faith, evangelicalism is weak or next to nonexistent; as a subculture, it is stronger but often embarrassing and downright offensive.

In "Losing our Virtue", David Wells wrote:
Twenty five years ago ... theology was a more honorable word, and there was a sense of mission that was infectious. That was the day when the trees that stood tall in this world were usually made so by their theological conviction and not simply by their money, size of their church, ... there has nevertheless come a hollowing out of evangelical conviction, a loss of the biblical Word in it authoritative function, and an erosion of character... (GPFHG 78)

Piper:The great end of all study - all theology - is a heart for God and a life of holiness. (GPFHG 75)