“Seth material” search engine (Jane Roberts)

Now I have told you that you may legitimately visit not only the past, present and future as it existed, or will exist in physical terms; but you may also visit realities which never existed in physical terms. In our earliest sessions I emphasized that the intensity regulated the duration of an experience. Now, many events that were only imagined and never took place, physically speaking, many such events still exist. They are simply not a part of your definition of reality. You may therefore visit a museum which was planned in the 16th century, but never built. Such a museum has a reality as real, you see, as the house in which you live. Ordinarily you only perceive physical reality. In projections you may visit other realities such as these also—which you may be tempted to call imaginary, but they are not.

A study of any up-to-date scientific thesis on the nature of sensual perception in general will show you that sense data exists independent of the perceiver, yet not necessarily in physical terms.