Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.

形容自然景观的壮丽与难以用笔墨完全描绘。

追求数学知识是一场永无止境的冒险，充满了挑战、惊喜和解决不可解问题的满足感。

邪恶获胜的唯一必要条件是好人无所作为。