宇宙不是敵對(duì)的，也不是友好的。它只是漠不關(guān)心。
最大的風(fēng)險(xiǎn)是不冒任何風(fēng)險(xiǎn)。在一個(gè)快速變化的世界里，唯一注定失敗的策略就是不冒險(xiǎn)。
The most profound discoveries often start with simple observations.
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.