普鲁士是从加农炮炮弹里孵出来的。
教育儿童，就不需要惩罚成年人。
一份不允许我用武力捍卫自己免受攻击的契约总是无效的。
【译文】 孔子说：“祭奠别人的先人，是谄媚；遇到符合道义的事不敢做，是懦夫。”
Some people want it to happen, some wish it would happen, others make it happen.
The pursuit of mathematical knowledge is a journey that never ends; there is always more to discover and understand.
The very least you can do in your life is to figure out what you hope for. And the most you can do is live inside that hope. Not admire it from a distance but live right in it, under its roof.