The world is full of signs and wonders that come, and go, and if you are lucky you might catch the tail of one as it flies past.
The pursuit of mathematical knowledge is a never-ending adventure.
The happiness of society is the end of government.
You are the author of your own life.
普鲁士是从加农炮炮弹里孵出来的。
Life can only be understood backwards; but it must be lived forwards.