To understand psychology, observe behavior in its natural context.

夏天的飞鸟，飞到我窗前唱歌，又飞去了。 秋天的黄叶，他们没有什麼可唱的，只是叹息一声，飞落在那里。

The way positive reinforcement is carried out is more important than the amount.

The Nobel Prize is not the end of the journey; it's a new beginning.