弦理论的数学美感表明它必须是自然界终极描述的一部分。
我一直相信最好的还在后头。
——1963年6月25日在西德市政厅柏林墙前的演说
与我们所承担的责任相比,石料的重量微不足道。
The natural price of labor is that price which is necessary to enable the laborers, one with another, to subsist and to perpetuate their race, without either increase or diminution.
The most important thing in banking is to make sure that the bank doesn't fail.