一个好的数学家是懒惰的，但是以一种建设性的方式。
A good mathematician is lazy, but in a constructive way.
The only truly secure system is one that is powered off, cast in a block of concrete and sealed in a lead-lined room with armed guards - and even then I have my doubts.
如果你希望成功，当以恒心为良友、以经验为参谋、以谨慎为兄弟、以希望为哨兵。
Do not let your fire go out, spark by irreplaceable spark.
The novel is the highest example of subtle inter-relatedness that man has discovered.