What is the substance of thought‪?‬

"What is the substance of thought? - 25 July 1975 • What is the basic reason for thought to be fragmented? • What is the substance of thought? Is it a material process, a chemical process? • There is a total perception, which is truth. That perception acts in the field of reality. That action is not the product of thought. • Thought has no place when there is total perception. • Thought never acknowledges to itself that it is mechanical. • Total perception can only exist when the centre is not."