To the end of his life he labored over the lessons then taught. Never was demonstration more tangled. Hegel's metaphysical doctrine of the identity of opposites was simpler and easier to understand. Yet the stages of demonstration were clear.

直到他生命的尽头，他都在努力学习当时所教授的课程。演示从未如此纠结。黑格尔关于对立面同一性的形而上学学说更为简单易懂。然而，示范的阶段是明确的。