Postmoderns revel in uncertainty. The more they learn, the less they know; and the less they know, the more certain they are that no one else knows anything, either. David Wells comments,

   What we hear from many of the emergent church leaders who are most aware of the (post)modern ethos, therefore, is a studied uncertainty: “We do not know.” “We cannot know for sure.” “No one can know certainly.” “We should not make judgments.” “Knowing beyond doubt is not what Christianity is about.” “We need to be more modest.” “We need to be more honest.” “Christianity is about the search, not about the discovery.” “Christianity is about the spiritual journey, not about arriving.” They forget that Scripture is divine revelation. It is not a collection of opinions of how different people see things that tells us more about the people than the things. No. It gives us God’s perfect knowledge of himself and of all reality. It is given to us in a form we can understand. The reason God gave it to us is that he wants us to know. Not to guess. Not to have vague impressions. And certainly not to be misled. He wants us to know. It is not immodest, or arrogant, to claim that we know, when what we know is what God has given us to know through his word.

   Listen to the new Testament . . . Hear plain speaking and words that ring with conviction: “We know. . . . We know. . . . We know.” in the Johannine Epistles, for example, we are told that we know the truth (1 John 2:21; 2 John 1; cf. John 8:32). And not only in the Johannines. Paul speaks of coming to a “knowledge of the truth” (2 Tim. 2:25; cf. 3:7–8; 4:4). The writer of Hebrews speaks of a “knowledge of the truth” (Heb. 10:26), and Peter speaks of “obedience to the truth” (1 Pet. 1:22). If truth is uncertain, elusive, out-of-reach, lost on us as we live in our own private worlds of (post)modern “reality,” what on earth are the apostles talking about?

—David F. Wells, The Courage to Be Protestant: Truth Lovers, Marketers, and Emergents in the Postmodern World (Eerdmans, 2008), 77, 79.