Logic Chain of the Dialectic of Practical Reason
中文流程图
- 经验层面
- 自然因果律 → 一切行为被决定
- 道德律 → 必须假设自由
👉 矛盾出现(自由 vs 必然)
- 第一章:二律背反
- 理论理性:无法解决矛盾(自由与因果对立)
- 实践理性:必须预设自由,否则“应当”无意义
👉 自由被确立为实践理性的前提
- 第二章:最高善
- 道德律不仅要求行动,还要求“最高善”(美德+幸福)
- 现实世界:美德与幸福常常分离
👉 矛盾出现(美德 vs 幸福)
- 解决方案:三大设定
- 自由:保证道德行动可能
- 灵魂不朽:保证无限趋近于道德完满
- 上帝存在:保证美德与幸福最终调和
👉 最高善在理性层面成为可能
English Flowchart
- Empirical level
- Natural causality → All actions determined
- Moral law → Must assume freedom
👉 Conflict arises (freedom vs necessity)
- Chapter I: Antinomy
- Theoretical reason: cannot solve contradiction (freedom vs causality)
- Practical reason: must presuppose freedom, otherwise “ought” is meaningless
👉 Freedom established as presupposition of practical reason
- Chapter II: Highest Good
- Moral law requires not only action but also the “Highest Good” (virtue + happiness)
- Reality: virtue and happiness often diverge
👉 Conflict arises (virtue vs happiness)
- Solution: Three Postulates
- Freedom: makes moral action possible
- Immortality of the soul: allows infinite progress toward moral perfection
- Existence of God: ensures harmony of virtue and happiness
👉 Highest Good becomes possible on the rational level
✅ 总结:康德通过辩证论设定了理性的边界:
- 理论理性不能证明自由、灵魂、上帝;
- 但实践理性必须设定它们,才能让道德与最高善有意义。
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