The active function of knowledge manifests itself not only in the active leap from perceptual to rational knowledge, but -- and this is more important -- it must manifest itself in the leap from rational knowledge to revolutionary practice.

• 认识的能动作用，不但表现于从感性的认识到理性的认识之能动的飞跃，更重要的还须表现于从理性的认识到革命的实践这一个飞跃。