“You see thought can be used to analyse thought, and it’s perfectly alright, because thought is a material process like any other process. We can analyse physical processes in matter; but thought is a material process; it goes on in the brain. It’s pretty well proved, you see, by modern, scientific observations: every time you think, there are changes in the blood and in the chemistry and in all sorts of electrical signals and what not; therefore thought is a material process. Now, we’re not suggesting analysing it with instruments, but rather to observe this material process and analyse it as any other material process. If you said thought was a spiritual thing and something far beyond anything of the ordinary, then you’d say we couldn’t analyse it. That has been the common attitude, right? Now that science is suggesting that thought is a material process, it opens up the possibility that analysis can be done. But no scientific progress is possible by analysis alone. You need to have observation - something beyond thought.” David Bohm, 1987 - © David Bohm Seminars