“No, we can’t. One day Hashem will reveal the truth. By that time, the ones who are Not on the side of truth will lose. It will be too late for them. I’m almost 100% confident that I’m on the right side! G’luck to you -you’re gonna need it!”
Health: That’s the way that sectarians like the Essenes viewed Judaism. We hold of Eilu V’eilu Divrei Elokim Chayim. So long as someone is Oved Hashem B’chol Kocho and does what he thinks is what Hashem wants through his Mesorah and his understanding of Torah Sheba’al Peh then HKBH views it as if he did everything right, regardless of what will be Paskened in Yemos Hamashiach.