未来是未知的，所以我们应该珍惜现在。

未来属于那些今天种树的人。

Trust your instincts, they know the way.

心理学的任务是研究经验的直接内容及其组合。

愛とは、相手を理解しようとすることだ。

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.

——一九二八年四月十三日斯大林在联共(布)莫斯科组织的积极分子会议上所作的报告《关于中央委员会和中央监察委员会四月联席全会的工作》