The rejection of objective truth in postmodern thought has its roots in something much deeper than the professed desire for “conversation” and the focus on the “journey” rather than the destination. David Wells writes,

   At the heart of [the] sin that holds us captive is pride. The essence of sin is finding in the self what in fact can be found only in God. So pride, as Cornelius Plantinga writes in Not the Way It’s Supposed to Be, leads us to think much about the self and much of the self. We imagine that within ourselves we have power enough, wisdom enough, and strength enough to live in security, in the fullness of happiness, as we want to live, amidst all the conflicts and opportunities of life. Very finite preoccupations are therefore substituted for those that are eternal, and we then confidently take the place God once had. We therefore redefine reality. Is this not the ultimate explanation as to why life in the postmodern world has lost its center? What I am describing here, within a biblical framework, is what others in the postmodern world are seeing without this framework. This is the “autonomous self.”

—David F. Wells, The Courage to Be Protestant: Truth Lovers, Marketers, and Emergents in the Postmodern World (Eerdmans, 2008), 103.

This is the root of the rejection of absolute, objective truth. Postmodern man, indeed, modern man, and all who have come before and, no doubt, all who will follow, rebel against the claim that they cannot determine for themselves what is true and right, that there is an authority outside themselves that is eternal, unchanging, and absolute. Most unacceptable of all, this authority is not subject to their judgments, and couldn’t be less interested in their opinions. This authority, of course, is God; and this exaltation of self is no less than a rejection of God.