I simply mentioned the notion of misconceptions. Surely you believe that such a thing as a misconception actually exists.
Anyway, I was simply agreeing with you that human thought is real. If one were thinking in a sloppy way, then one might confuse misconceptions with what is unreal. However, human misconceptions have an effect on the real world, and thus human misconceptions are themselves real. However, the fact that reality includes, among other things, the phenomena of human beings thinking isn't the point of this thread.
The point of this thread is that in conceiving of ideas we don't have complete freedom to bend them to our will. Ideas themselves are connected to each other in ways that form a structure with its own characteristic patterns and textures. To gain access to information about this structure requires patience, devotion, and effort. Patience is required to wait for insights to arrive on their own schedule. Devotion is required to retain insights when they arrive and not, merely because they may seem counter-intuitive, reject them in a knee-jerk manner when they arrive. Effort is required to personally think about and understand the insights that have accumulated over many generations of human civilization.