Materialism and the Dialectical Method (Volume 1), Historical Materialism (Volume 2), The Theory of Knowledge Quotes

“Of course, science is based on observation, but this is not its most essential feature. The basis of science is not mere observation, but experiment. Science is based on an activity of interfering with nature, changing it. [...] And we test it, develop it, and use it also in changing nature. Science is not a dogma, but a guide to action. On the other hand, if it becomes divorced from practice, it degenerates into dogma.”
― Maurice Cornforth, Dialectical Materialism Volume One (1) Materialism and the Dialectical Method