1. The Truth is... a riddle
What is something that humans seek, and don't know it when they see it?
The answer is the truth!
(C.f. Jacobellis v Ohio 1964 in which the judge declined to define hard-core pornography, but famously said "I know it when I see it".)
2. The Truth is... not known
The conundrum of seeking truth but not knowing it when we see it is embedded in the idea of knowledge as justified true belief.
It is said that we know something to be true if
(a) we believe it to be true,
(b) we have justification for our belief, and
(c) it is true.
We can build towards knowledge
with beliefs and justifications,
but we fail unless it's true.
And how do we "know" if it's true?
Whether something is true is... unknown.
Frustrating!