從主體行動出發去理解事物的存在和發展變化,是馬克思從其青年時代直到晚年都一直持有的理論原則。但要對資本主義進行科學研究,卻不能直接以主體行動作為對象,而是只能以作為主體行動之結果的客觀結構為對象。這便要求有一個從主體行動的邏輯向客觀結構的邏輯的過渡或轉換,如此方能夠合理地建構起關于資本主義的科學體系。而《資本論》"商品和貨幣"篇,特別是其中的"價值形式"分析,便是馬克思精心構造起來的這一過渡環節或"轉換樞紐"。遺憾的是,以往人們對于《資本論》中辯證法的闡釋中,卻往往忽視或誤讀了這一關鍵問題。

As a theoretical principle,Marx had held to understand the existence and development of things based on subjective actions through all his life. However,scientific research on capitalism cannot directly depend on subjective actions,but on objective structures,resulting from subjective actions. It was thus only with a transition or transformation from the logic of subjective actions to the logic of objective structures that a scientific system concerning capitalism can be reasonably constructed. The part entitled "Commodities and Money"in Capital,especially its analysis of "value form,"is the transitional link or "transition hub"that Marx elaborately constructed for this purpose. Regrettably,in the past,this key issue has often been neglected or misunderstood in the interpretation of dialectics in Capital.