Writing is a way of reclaiming the past.
A mathematician's work is mostly a solitary pursuit, but it builds on the work of many others.
出自北齊·顏之推《顏氏家訓·教子》引諺語。教育媳婦，要趁她剛嫁到婆家之時；教育孩子，應當趕在孩提時代，教育要掌握最適宜的時間才會有效果。
A proof is a way to convince yourself and others that something is true.
To be human is to be in the world, and to be in the world is to be in time.
物種和系統(tǒng)的多樣性不是復雜，而是保險。