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。