人不是物中的物;物相互决定,但人最终是自我决定的。
People demand freedom of speech as a compensation for the freedom of thought which they seldom use.
代数是人类创造的一种智力工具,用于清晰地表达世界的数量关系。
80% of life's most defining moments take place by age 35.
The challenges of today are the opportunities of tomorrow—if we approach them with the right mindset.
The more you know, the more you see.