I wish writers would read what they have written before they publish. He either started with one thought and finished with another or he is unfamiliar with the conjugation of "to be."
I diagrammed that sentence as I was taught in Catholic school. The subject (noun) is “truth” (singular). The verb should be “is” not “are.” I wish Sister Veronica was still around with her ruler. Whoever wrote that sentence deserves a slap on the back of their hand.