The Certainty of Christianity

Written by Mark Farnham

On January 10, 2024

by Jeff Mindler, Research Assistant at Apologetics for the Church

“Everyone then who hears these words of mine and does them will be like a wise man who built his house on the rock. And the rain fell, and the floods came, and the winds blew and beat on that house, but it did not fall, because it had been founded on the rock. And everyone who hears these words of mine and does not do them will be like a foolish man who built his house on the sand. And the rain fell, and the floods came, and the winds blew and beat against that house, and it fell, and great was the fall of it. And when Jesus finished these sayings, the crowds were astonished at his teaching, for he was teaching them as one who had authority, and not as their scribes.” ~Matthew 7:24-29

In an age of skepticism, where the very concept of certainty seems elusive, it is imperative to explore the foundations of our beliefs. How can we know anything with certainty, especially in matters of faith? This article will demonstrate how a presuppositional apologetic establishes the certainty of Christianity by examining the self-attesting authority of God’s Word.

Human beings naturally yearn for certainty, especially when it comes to fundamental questions about life, morality, and matters of faith. Skepticism, which posits that certainty is unattainable, challenges our pursuit of truth. If we can’t know anything for certain, how can we distinguish right from wrong or establish a foundation for our beliefs?

Presuppositional apologetics offers a unique response to the claims of skepticism by asserting the need for a self-attesting authority, and it finds this authority in the Christian faith. One of the central tenets of a presuppositional apologetic is the belief that God’s Word is self-authenticating and self-attesting. This means that the Bible, as the inspired and infallible Word of God, carries within itself the evidence of its own truthfulness. It is the ultimate authority by which all other claims are judged. The authority of God is absolute and unassailable. Within the Christian worldview, God’s Word is the foundation upon which all knowledge and truth rest. To question or deny this is to challenge the very concept of truth itself.

Building upon the self-attesting Word of God, a presuppositional apologetic asserts that the certainty of Christianity is grounded in the impossibility of the contrary. To reject Christianity is to embrace absurdity and foolishness. Psalm 14:1 proclaims, “The fool says in his heart, ‘There is no God.'” This verse underscores the idea that denying the existence of God, as revealed in the Bible, is a departure from rationality itself.

To conclude, in the search for certainty amidst skepticism, presuppositional apologetics provides a unique and profound perspective. It posits that the certainty of Christianity is founded on the self-attesting authority of God’s Word. By affirming the Bible as the ultimate source of truth and knowledge, presuppositional apologetics challenges the claims of skepticism and the denial of Christianity as a rational worldview. In a world where skepticism can cloud our beliefs and challenge our faith, presuppositional apologetics invites us to consider the ultimate foundation of our convictions. It reminds us that the certainty of Christianity is not only reasonable but also indispensable for a coherent and meaningful worldview.

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