In chapter six of Doug Groothuis’ helpful book, Christian Apologetics, he does a nice job explaining and refuting postmodernism from a Christian point of view. He notes that in postmodernity, “dialoging about one religion being true or another false is beside the point. All are ‘true’ in the postmodern sense because they give meaning and direction to people’s lives….”
“The postmodernist view also bears on the increasing tendency of some contemporary people to create their own religions (or ‘spirituality’) by mixing and matching elements of several religions, however incompatible these may be. If spiritual truth is a matter of social or individual construction, then one need not be constrained by logical consistency or adherence to a received tradition (say Buddhist, Jewish, Christian, or Islamic).”
“There is an element of pragmatism here as well. If it ‘works’ for someone to combine elements of Hinduism (the practice of yoga) and Christianity (church attendance, the golden rule, and prayer), one need not worry about intellectual consistency or spiritual fidelity to an ancient tradition or revealed authority. But this smorgasbord approach lacks intellectual integrity because it makes religious belief something to use instead of something to discover and live by.”
Excellent points! And of course, postmodernist and pragmatic views of religion and spirituality fall short:
“Postmodernity often erodes religious confidence. What results is a free-floating spirituality largely devoid of certainty or sustained convictions.”
The Christian faith, however, isn’t free-floating, nor is it devoid of certainty, sustained convictions, or truth. Because the gospel is true, it gives us direction, certainty, and convictions. You can find this entire excellent discussion in chapter 6 of Groothuis’ Christian Apologetics.