哲学上的错误比数学上的错误要严重得多。

The hardest part of returning to a truly wild environment is leaving behind the mechanical distractions of modern life.

Propaganda is to a democracy what the bludgeon is to a totalitarian state.

【大意】等到大寒节气到来时，冰霜寒雪从天而降，然后才能知道只有松柏能经得住严寒考验，依然繁茂。