有一个你无法解决的问题总是好的。这意味着你有事情要做。
It is always good to have a problem that you cannot solve. It means you have something to work on.
The greatest threat to democracy is not from external enemies but from internal decay and the loss of civic virtue.
A verdadeira viagem de descobrimento não consiste em procurar novas paisagens, mas em ter novos olhos.