There is no endpoint to increasing understanding. Therefore, truth is something that is worked towards. The task is never completed. No one can arbitrate truth. No one can say exactly what truth is.
Persons can only show evidence of what truth is and work toward improved understanding of it.
While the unified reality which it represents can be complete, the representation of it called truth cannot. It's ok to call Christ's words truth, and a lot of other things truth, as a figure of speech. And even then, trying to understand those so-called truths is a never ending process. God cannot end sin by speaking a word. The supposed infinite abilities of God is another ruse used to obstruct truth and justify misinterpretations of Scriptures.