现在已经清楚，杂种形成的种子具有两个分化性状中的一个或另一个。

未来不是现在提供的不同路径中选择的结果，而是一个被创造的地方——首先在思想和意志中创造，然后在行动中创造。

The magi, as you know, were wise men—wonderfully wise men—who brought gifts to the Babe in the manger. They invented the art of giving Christmas presents. Being wise, their gifts were no doubt wise ones, possibly bearing the privilege of exchange in case of duplication.

心理学家必须是一个严格的实证主义者。

父亲们最根本的缺点，在于想要自己的孩子为自己争光。