The word of truth concerning us is specific. It is "the gospel of your salvation".
Ephesians 1:13 In whom ye also trusted, after that ye heard the word of truth, the gospel of your salvation: in whom also after that ye believed, ye were sealed with that holy Spirit of promise,
I feel sorry for you. You've spent so much time studying all of your so called church history that you haven't studied to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth (which you also can't define just how it is that we do that).
Whatever . . .