对民主的最大威胁不是来自外部敌人,而是来自内部腐败和公民美德的丧失。
The greatest threat to democracy is not from external enemies but from internal decay and the loss of civic virtue.
译文:大道没有具体的形态,那么内心要凭借什么去领悟呢?关键在于每个人自身的智慧和见识是否高明。
The hardest decisions often yield the greatest rewards.
Technological innovation is the fundamental way to solve the problems of the coal industry.