The psychologist must avoid all metaphysical assumptions.

The past is a puzzle, and we are all trying to piece it together.

I have to be alone very often. I’d be quite happy if I spent from Saturday night until Monday morning alone in my apartment. That’s how I refuel.

Pity, or compassion, is an emotion equally natural to all men.

海洋不仅是一种资源；它是我们必须为子孙后代承担的责任。