在我们内心有一片广袤的未知领域，如果要解释我们的情感波动和风暴，就必须考虑到这片领域。

The desire for a just society is a permanent part of the human condition.

The mother is the main factor in the child's world. Her behavior creates the behavior of the child.

Behavior, as such, is not to be regarded as a mere chain of muscular contractions, but rather as a purposive and cognitive affair.

农业成功的真正标准是可持续性——在生产力与环境管理之间取得平衡。