Who was it who said: To the one who believes, there are no questions (of this sort); to the non-believer, no answer will ever suffice.
Would you trust the Beis Yosef, the auther of the Shulchan Oruch as being honest? He transcribed many conversations he had with a malach/magid in a book/sefer called Magid Maishorim. He mentions that the angel told him to learn Chovas Halvovos every day for his yiras shomayim. Is that a good enough approbation? To a believer in G-d’s Torah, yes!
(If you’re reffering to every new sefer published, then true, if the auther hasnt stood the test of time, it may be not be true.. The ones who stood the test of time…)