笛卡尔“我思故我在”的主体意识研究

A Study on Subjective Consciousness in Descartes’ “Cogito, Ergo Sum”

摘要: “我思故我在”是笛卡尔哲学体系中的核心命题，也常被视为近代主体性哲学真正的开端。十七世纪以来，传统知识权威逐渐失去原有的稳固地位，自然科学的发展又不断冲击着旧有世界图景。在这样的思想背景下，笛卡尔开始重新追问：是否存在一种完全不可怀疑的知识基础？他采取方法论怀疑，把感官经验、外部世界，许多看似确定的观念，都暂时置于怀疑之中。可就在不断怀疑的过程中，他发现，有一点始终无法被否定——当怀疑发生时，思想活动本身已经存在。于是，“我思故我在”成为了他哲学大厦中的第一个确定性原则。本文主要围绕我思和我在之间的内在关系展开讨论，对笛卡尔主要思想进行概念分析，分析其中所包含的主体意识结构和哲学意义。通过对这一命题的梳理，可以进一步看到，笛卡尔实际上完成了哲学重心的一次重要转移——知识的根据不再首先来自外部世界，而是转向主体自身的意识活动。也正因如此，“我思故我在”成为笛卡尔哲学体系的理论支点，还开启了近代哲学对于主体、自我意识以及确定性问题的持续探讨，深刻影响了后世主体性哲学的发展。

Abstract: “Cogito, ergo sum” is the central proposition in Descartes’ philosophical system and is often regarded as the true beginning of modern philosophy of subjectivity. Since the seventeenth century, traditional authorities of knowledge had gradually lost their former stability, while the development of natural science continued to challenge the old worldview. Against this intellectual background, Descartes began to ask anew whether there could be a completely indubitable foundation for knowledge. He adopted methodological doubt, temporarily calling into question sensory experience, the external world, and many seemingly certain ideas. Yet in the very process of constant doubting, he discovered that one thing could never be denied: when doubt occurs, the activity of thinking itself already exists. Thus, “Cogito, ergo sum” became the first principle of certainty in his philosophical edifice. This paper mainly discusses the internal relationship between “Cogito, ergo sum,” conducts a conceptual analysis of Descartes’ major ideas, and examines the structure of subject consciousness and philosophical significance contained in this proposition. Through an analysis of this proposition, it can be further seen that Descartes in fact accomplished an important shift in the focus of philosophy: the foundation of knowledge no longer derives primarily from the external world, but turns instead to the subject’s own conscious activity. For this reason, “Cogito, ergo sum” not only serves as the theoretical cornerstone of Descartes’ philosophical system, but also initiates modern philosophy’s ongoing inquiry into the subject, self-consciousness, and certainty, profoundly influencing the later development of the philosophy of subjectivity.