If there's a book that you want to read, but it hasn't been written yet, then you must write it.
To write is to rewrite, and to rewrite is to understand.
自由的代价是永恒的警惕。
Mathematics is the foundation upon which we build our understanding of the world, and it is through this understanding that we can solve the most complex problems.
Be civil to all; sociable to many; familiar with few; friend to one; enemy to none.
文化只是一种充满激情的共同做事方式。