He who loves practice without theory is like the sailor who boards ship without a rudder and compass and never knows where he may cast.
只热爱实践而无理论的人,就像没有舵和罗盘的水手,永远不知道他可能漂流到哪里。
"The beauty of mathematics only shows itself to more patient followers."
美国农民是我们经济中唯一必须以零售价购买所需一切,以批发价出售所产一切,并支付双向运费的人。