The path to truth is not a straight line. It is a spiral where you return to previous points with a deeper understanding of truth.

Very well said. you should consider posting in #philosophy.

I would add that there is a major gap between understanding the truth (on an intellectual level) and actually knowing the truth. The exact same difference there is between understanding how it would feel to lose a loved one, and actually feeling it which for most people is only fully reachable upon actually losing the loved one. The projection is a mental model of reality, the loss is the real thing. Understanding the nature of reality is something that requires a long period of soaking, deliberate inquiry, and serendipitous accidents that throw a cog in the machine and give one a tangible reason to start doubting what she perceives. And it very much is a spiral.