To one extent or another, then, you learn to constantly monitor your behavior, so that it conforms to the established criteria set up for sane or rat… - Jane Roberts

There have indeed been civilizations upon your planet that understood as well as you, and without your kind of technology, the workings of the planets, the positioning of the stars -- people who even foresaw "later" global changes. They used a mental physics. There were men before you who brought back data quite as "scientific" and pertinent. There were those who understood the "origin" of your solar system far better than you. Some of these civilizations did not need spaceships. Instead, highly trained men combining the abilities of dream-art scientists and mental physicists cooperated at journeys not only through time but through space.

Yet the fact remains that there is a dream reality with a "structure," "landscape" and images that appear to be made of matter -- but matter that obeys different rules than those with which we are familiar. Dreams are not just psychological events. There is a dimension of reality (an "objective" dimension, if you prefer), in which all dream events happen. There are rules: Seth calls them root-assumptions that operate in all realities, our own included. We have to learn what root-assumptions govern dream reality.

The effect of any thought is quite precise and definite and set into motion because of the nature of its own electromagnetic identity. The physical body operates within certain electromagnetic patterns and is adversely affected by others. These effects change the actual molecular structure of the cells, for better or worse, and because of the laws of attraction, habitual patterns will operate. A destructive thought, then, is dangerous not only to the present state of the organism, but is also dangerous in terms of the 'future.'