This dialectical-materialist theory of the process of development of knowledge,basing itself on practice and proceeding from the shallower to the deeper,was never worked out by anybody before the rise of Marxism.

• 这种基于实践的由浅入深的辩证唯物论的关于认识发展过程的理论，在马克思主义以前，是没有一个人这样解决过的。