It is common sense to take a method and try it. If it fails, admit it frankly and try another. But above all, try something.

But who prays for Satan? Who, in eighteencenturies, has had the common humanity to pray for the one sinner that needed it most?（From Jane Lampton Clemens）

There are two possible outcomes: if the result confirms the hypothesis, then you've made a measurement. If the result is contrary to the hypothesis, then you've made a discovery.

出自汉·桓宽《盐铁论·复古》。岩雀并不知道天的高远，废井中的青蛙也不会知道江海的博大。这句话是形容心胸狭窄之人见识短浅。

四元数的诞生，如同几何、代数、形而上学和诗歌这四位父母的奇特后代。

The hand remembers what the mind forgets.

Short-term gains should never compromise long-term environmental health.

纯数学和应用数学之间的相互作用是真正创新发生的地方。