This is sharp insight describing the profound effects of relativism, here referred to as "indiscrimination".
It is often difficult for us to know how deeply even we who aspire to, and/or profess, a radically "unworldly" world-view are informed and guided by such error.
In addition, while it is Christ who builds the church, understanding prevalent world-views may help us to more effectively influence others for the Gospel.
The video is about 47 minutes.
Evan's blog, Sayet Right