The psychologist must avoid all forms of reductionism.

All happy families are alike; each unhappy family is unhappy in its own way.

凡是言论好行动，有利于上天鬼神与百姓的就做，凡是言论好行动，有害于上天鬼神与百姓的就舍弃。 

Sustainable fishing isn't an option—it's the only way forward.