外部条件影响下生命形式的发展是一个极其重要的课题。

无限的责任是一种病态。

Every child should have mud pies, grasshoppers, water bugs, tadpoles, frogs, mud turtles, elderberries, wild strawberries, acorns, chestnuts, trees to climb, brooks to wade in, water lilies, woodchucks, bats, bees, butterflies, various animals to pet, hayfields, pine-cones, rocks to roll, sand, snakes, huckleberries and hornets; and any child who has been deprived of these has been deprived of the best part of education.

文学是语言的艺术，语言是文学的艺术。

不要为你的失败感到尴尬，从中学习并重新开始。