A key difference between a dialogue and an ordinary discussion is that, within the latter people usually hold relatively fixed positions and argue in… - David Bohm

it has always been both necessary and proper for man, in his thinking, to divide things up, and to separate them, so as to reduce his problems to manageable proportions; for evidently, if in our practical technical work we tried to deal with the whole of reality all at once, we would be swamped. So, in certain ways, the creation of special subjects of study and the division of labour was an important step forward.

We propose instead that the basic element be a moment which, like the moment of consciousness, cannot be precisely related to measurements of space and time, but rather covers a somewhat vaguely defined region which is extended in space and has duration in time.

as time passes, unsolved problems within a given paradigm tend to accumulate and to lead to ever-increasing confusion and conflict. Eventually some scientists, who are generally spoken of as geniuses, propose fundamentally new ideas and a “scientific revolution” results. In turn, these new ideas eventually form the basis of a new paradigm, and sooner or later, this rigidifies into “normal” science. In this way the cycle of revolution and “normal” science continues indefinitely.