If you don't go through the tough times, you don't get to the good times.
如果你不經(jīng)歷艱難時(shí)刻，你就無法到達(dá)美好的時(shí)光。
思想掠過我的心上，如一群野鴨飛過天空。我聽見它們鼓翼之聲了。
Mental processes evolved to solve practical problems.