很可能还会发明出其他几种辅助视觉的工具，它们超越现有工具的程度，就像现有工具超越肉眼一样。
The past beats inside me like a second heart.
The deepest problems of modern life derive from the claim of the individual to preserve the autonomy and individuality of his existence in the face of overwhelming social forces, of historical heritage, of external culture, and of the technique of life.
动物是如此令人愉快的朋友——它们不问问题，也不妄加批评。
如果你想做好一件事，就自己动手。
The journey of a thousand miles begins with a single step.
