Yes, all we experience is our own perceptions and experiences... the "inner world".
Along those lines, do you find that suttas like the following ones are discussed in this context in Thailand?SN 35.23: Sabba Sutta http://www.accesstoinsight.org/tipitaka ... .than.htmlSN 2.26: Rohitassa Suttahttp://www.accesstoinsight.org/tipitaka ... .than.html
Through corruption of the Dhamma comes corruption of the discipline, and from corruption of the discipline comes corruption of the Dhamma. This is the first future danger as yet unarisen that will arise in the future. You should recognize it and make an effort to prevent it. (AN 5.79)
Neither traceable in the Discourses nor verifiable by the Discipline, one must conclude thus: 'Certainly, this is not the Blessed One's utterance; this has been misunderstood by that bhikkhu — or by that community, or by those elders, or by that elder.' In that way, bhikkhus, you should reject it. (DN 16)