The journey of discovery is filled with uncertainties, but it is these uncertainties that make science so exciting.
Do what you can, with what you have, where you are.
【译文】是是非非每天都有,若不去听它自然就不存在了。宁可生活贫困,做一个正直的人,也不能生活富足,做一个奸邪的人。有些事宁可相信它有,也不要相信它没有。