Mysticism

Hello Rabbi,
According to the definition of mysticism in the lessons, mystical knowledge must be passed on in the form of trust because it is completely subjective and dependent on the personal experiences of the person who holds the knowledge.
My question is what about human psychology or the concept of the soul? Is this world and all the knowledge in it mysticism? After all, all of a person's psychological content, desires, thoughts, feelings (even the feeling of pain, but perhaps that's a bit off the question) all of these and more are a completely subjective world and subject to judgment from the outside and only out of trust, or out of personal experience.
And if, for example, we look at psychology in contrast to a mystical field like numerology – then you can study psychology observationally, like looking at a child growing up, or more general analyses of society and religions based on surveys and statistics. But all of this also exists in mysticism, in numerology – a person can give lectures on why companies founded on certain dates are more profitable and give examples of this, or predict all kinds of things that will happen, like an earthquake and a market crash.
There is "observation" in both of these worlds, but in both, observation reaches a certain level where we already encounter the differences between the objective and subjective worlds.

The rabbi is a dualist. So am I. And dualism carries with it a solipsistic doubt, perhaps the smallest of the small, but it is still there – this wall or the body-mind problem. Is the mind a mystical concept in your eyes?

By the way, in my opinion the answer could very well be yes, but in my opinion in the second lesson you did say a sentence or two about psychology and did not include it with mysticism.

Thank you very much for the answer.