Worldview is a concept that has become more common over the last few decades. One of the reasons for the growth of its use in intellectual and religious conversations is that it allows us to understand why people believe the things they do. Understanding a person’s worldview allows you to trace the logical outcome of their heart commitments, and to discern inconsistencies and contradictions when people don’t remain coherent in their beliefs.
Coherence is a significant part of thinking rationally, and the nature of worldviews allows us to test the rationality of a belief system. This is essentially what you are doing when you are asking the type of questions we discussed in earlier chapters. Coherence means internal consistency, and a coherent position is one in which all the beliefs fit together. If, for example, I believe that man is nothing more than an animal, and with no more significance or value than an animal, it would be inconsistent for me to argue that humans have dignity or rights that animals don’t have. If I believe that this world came about by chance and mindless forces, it would be incoherent to talk about meaning in life.
Surprisingly, then, many worldviews contain internally incoherent elements. One way to become a better apologist is to familiarize yourself with various worldviews and learn to identify the logical implications for them. When you are able to do this, you will find that your ability to tear down strongholds and undermine the unbelief of the non-Christian grows significantly.
Definition and Explanation of a Worldview
Worldview is a complex concept that encompasses a person’s intellectual, emotional, religious, and psychological beliefs. Philosopher James Sire captures the heart of the concept in his definition. He writes that a worldview is “a commitment, a fundamental orientation of the heart, that can be expressed as a story or in a set of presuppositions (assumptions which may be true, partially true or entirely false) that we hold (consciously or subconsciously, consistently or inconsistently) about the basic constitution of reality, and that provides the foundation on which we live and move and have our being.”
Sire’s definition helps us see the personal nature of worldviews. They go beyond the head to the heart. The depth at which a person holds his worldview helps us see how radical it is for someone to change his worldview. This is why salvation must be a work of the Holy Spirit to internally regenerate a person so he can, in one moment, jettison his unbelieving worldview and embrace the gospel. Evangelism and apologetics, then, must happen prayerfully in the power of the Spirit for genuine conversion to happen.
In the next post we will look at the component parts of Sire’s definition.
 James Sire, The Universe Next Door, 5th ed. (InterVarsity, 2009), 20.