I do not know what I may appear to the world， but to myself I seem to have been only like a boy playing on the sea-shore， and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary， whilst the great ocean of truth lay all undiscovered before me.

The only limit to our realization of tomorrow is our doubts of today.

失去一个父母可能被视为不幸；失去两个则看起来像是粗心大意。

真理的概念在任何足够强大以包含算术的形式系统中都是不可定义的。

在任何事情中，都存在一个我们无法逾越的界限。

The most sustainable quarry is the one that balances production with environmental stewardship.

贫穷不仅仅是缺钱；它是关于拥有的太少以至于你甚至无法做出正确的决定。

The goal of mathematics is to make the simple complicated, and the complicated simple.

倾听公司里的每个人，并想办法让他们说话。

Comedy is the ultimate revenge against tragedy.

Never, never and never again shall it be that this beautiful land will again experience the oppression of one by another and suffer the indignity of being the skunk of the world.Let freedom reign!