You’ll never be able to please everybody, so just do what makes you happy.
Buying tools: Start by buying the absolute cheapest tools you can find. Upgrade the ones you use a lot. If you wind up using some tool for a job, buy the very best you can afford.
数学中的合作是必不可少的;思想的交流导致了任何单一思维都无法独自实现的突破。
Every generation imagines itself to be more intelligent than the one that went before it, and wiser than the one that comes after it.
The poem is a way of holding on to what otherwise would be lost.