Ludwig von Bertalanffy quotes:

Considering the inconceivable complexity of processes even in a simple cell, it is little short of a miracle that the simplest possible model - namely, a linear equation between two variables - actually applies in quite a general number of cases.

The fact that a theory so vague, so insufficiently verifiable, and so far from the criteria otherwise applied in 'hard' science has become a dogma can only be explained on sociological grounds.

It is the 'zoomorphic' or 'rattomorphic' fallacy - the expressed or implicit contention that there is no essential difference between rat and man - which makes American psychology so profoundly disturbing.

People are not machines, but in all situations where they are given the opportunity, they will act like machines.

Progress is only possible by passing from a state of undifferentiated wholeness to differentiation of parts.

Thus even supposedly unadulterated facts of observation already are interfused with all sorts of conceptual pictures, model concepts, theories or whatever expression you choose. The choice is not whether to remain in the field of data or to theorize; the choice is only between models that are more or less abstract, generalized, near or more remote from direct observation, more or less suitable to represent observed phenomena.

We are seeking another basic outlook: the world as an organization. This would profoundly change categories of our thinking and influence our practical attitudes. We must envision the biosphere as a whole with mutually reinforcing or mutually destructive inter-dependencies.