How easy it is for people to lose touch with reality

Do we really experience reality? Think about it. Where does our personal concept of reality really exist? We think that we are in touch with our surroundings through our senses. That is of course true -- up to a point . Without minds that have been honed by years of experience turning nerve and neural signals (generated by our thought processes and our five senses whenever these capture external stimuli; i.e., light, vibration, texture, etc.) into mental constructs, there would be no experience as we, well, experience it now. Indeed, our minds piece together mental models of the world based on how it interprets data , and we "experience" those models as proxies of the real world.