As I mentioned in my debate with an atheist; truth is not an imperative in an atheistic universe since in such a case survival is all that matters and you can survive by ascertaining empirical truths or by being utterly deluded—it matters not.
On the other hand, in YHVH’s universe truth is not only an imperative and ascertainable but truth is a person: the Messiah Jesus.
“What is truth?”
We should all be well aware that truth is and that it is absolute. One way to prove that truth is and that it is absolute is to simply note that anyone who disagrees believes that their negating position is absolutely true. Note that “absolute” means that something is what it is regardless of our opinion: we may like it or not, agree or not, prefer it be different or not, be aware of it or not and yet, it is what it is regardless. As, perhaps, a side note; be certain to not confuse “absolute” with “arbitrary.”
In an atheist universe, a God-free universe, truth is not an imperative. This is not to say that there is no truth in such a universe but that our knowledge of it is not necessarily relevant. In other words, we may survive by ascertaining empirical truths or by being utterly deluded; as survival is all that matters in such a universe. We may still need to learn facts so as to build safe buildings but overall and particularly regarding worldviews—it matters not.
Ask an atheist what “religion” is, what “God” is, what “faith” is, etc. and they will likely state that those where concepts to which humanity held as an evolutionary advantage which helped us survive. The fact that they now see themselves as more evolvedier than thou is another issue. See:
Memetic Mesmerism and Eumemics
The Desperation of the Deicidal, Memetic Eugenics and the Evolutionary Watchmen, part 1 and part 2
It counter-distinction to this making an irrelevance of truth we find that according to the Judeo-Christian worldview truth is an imperative:
Then Pilate entered the Praetorium again, called Jesus, and said to Him, “Are You the King of the Jews?” Jesus answered him, “Are you speaking for yourself about this, or did others tell you this concerning Me?” Pilate answered, “Am I a Jew? Your own nation and the chief priests have delivered You to me. What have You done?” Jesus answered, “My kingdom is not of this world. If My kingdom were of this world, My servants would fight, so that I should not be delivered to the Jews; but now My kingdom is not from here.” Pilate therefore said to Him, “Are You a king then?”
Jesus answered, “You say rightly that I am a king. For this cause I was born, and for this cause I have come into the world, that I should bear witness to the truth. Everyone who is of the truth hears My voice.”
Pilate said to Him, “What is truth?”
And when he had said this, he went out again to the Jews, and said to them, “I find no fault in Him at all (John 18:33-38).
Little did Pilate know that Jesus had stated, “I am the truth” (John 14:6) and “If you abide in My word, you are My disciples indeed. And you shall know the truth, and the truth shall make you free” (John 8:31-32).