1. "So what happens if you withdraw attention from the objects in space and become aware of space itself?" ~ PON Page 138
2. "So if you withdraw attention from things – objects in space – you automatically withdraw attention from your mind objects as well." ~Page 139 PON
3. "Everyone pays attention to the things in space, but who pays attention to space itself?" ~ PON Page 137
4. "Pay more attention to the silence than to sounds. Paying attention to outer silence creates inner silence: the mind becomes still." ~ PON Page 136 top
What Eckhart Tolle is describing is an "isomorphism" that exists between external physical objects & inner mental objects (thoughts). He is basically implying that the physical level & mental level, have a one-to-one mapping between the two sets.
He states, this becomes apparent... by noticing how merely moving our attention to physical empty space simultaneously creates a feeling of inner stillness & inner mental space within us.
The word “isomorphism” applies when two complex structures can be mapped onto each other, in such a way that to each part of one structure there is a corresponding part in the other structure, where “corresponding” means that the two parts play similar roles in their respective structures.
(G¨odel, Escher, Bach, p. 49)