最深刻的真理往往是我们忽略的那些。
The most profound truths are often the ones we overlook.
The most profound ideas in mathematics often arise from the simplest observations.
Happiness in this world, when it comes, comes incidentally. Make it the objet of pursuit, and it leads us a wild-goose chase, and is never attained. Follow some other object, and very possibly we may find that we have cought happiness without dreaming of it.