Don't let the noise of others' opinions drown out your own inner voice.

The natural price of labor is that price which is necessary to enable the laborers, one with another, to subsist and to perpetuate their race, without either increase or diminution.

True progress in agriculture comes from balancing technology with tradition.

这种鹏鸟向南方的大海迁徙，拍打翅膀可以掀动三千里水面，乘着风势而上，直向九万里高空，离开北方南飞六个月，方才止息。山中浮动的雾气，空中弥漫的尘埃，都是因生物用气息相吹而形成。天深蓝，这就是它的本色吗？还是因为天无限高远，看不到边际？当鹏鸟俯视下界，所看到的也不过像这样而已。

心理学的任务是解释心灵如何服务于生活。