Truth is told in propositional form. It is true
that if all humans are mortal, and Socrates is a human, then Socrates is
mortal. It is true that water boils at 100°C at standard atmospheric pressure. It is true
that the Berlin Wall fell in 1989. True propositions like the above are true
because they correspond to logical, scientific and historical reality. In John
14:6, Jesus tells us that He is the Truth – THE Truth in absolute form because
He’s God, and in personal form because He is the Divine Person.
Here’s how I believe we should frame it. True propositions are true because they correspond to reality; and in the deepest sense, they correspond to the ultimate reality, which is grounded in the nature and revelation of God - fulfilled and made manifest in Jesus Christ, who is the Truth.
To consider this philosophically, recall that Tarski showed that truth in formal systems must be defined in a higher-level language - a metalanguage - because a system cannot fully define its own truth. For example, in propositional logic or formal arithmetic, Tarski’s concept of truth requires a distinction between the object language (the language being used to describe the world) and the metalanguage (the language used to describe and evaluate the object language). This mirrors the idea that to fully understand the truth of things, we need something greater than the system itself to provide the proper context and evaluation.
Given the foregoing, if Christ is THE Truth because He’s God and the Divine Person (along with the Father and Holy Spirit – three aspects of the same One God), then Christ’s Truth is a Divine meta-metalanguage. You can think of like this. A metalanguage tells the truth about a language; a meta-metalanguage tells the truth about metalanguages.
In the same way Tarski's theory requires a higher-level "metalanguage" to describe the truth of a system, Christ, as the ultimate Truth, is the Divine meta-metalanguage through which all truths are made meaningful and coherent. Just as no formal system can fully define its own truth without reference to a broader framework, no aspect of reality - whether logical, scientific, or historical - can be fully understood or defined apart from Christ, who is the source of all truth. He is the Divine context and the Word (Logos) through which all things are revealed, ordered, and understood, and He is the ultimate frame of reference by which all truths are grounded. This Divine meta-metalanguage is not merely a system of rules or language; it is a living Person in whom truth is both revealed and enacted.
I get why this is hard to swallow if you’re a non-Christian, because we are talking about a hyper-reality on which this higher truth sits. But the corollary is that we cannot know truly apart from Christ, and all human knowing, especially when it taps into deeper truths, is fragmentary and only enhanced by Divine revelation, because Christ is being itself, sustaining reality (as per Colossians 1:17).
That’s also why, when it comes to salvation, Christ is the only way into truth, as His life, death, and resurrection bring us into communion with the Truth, where such fullness of Divine truth cannot be contained within human language alone.
