快乐是最高的善,我们追求快乐,避免痛苦。
Pleasure is the greatest good, and we should seek it and avoid pain.
The most important principle of positive psychology is that other people matter.
The meaning of a word is not a mental entity, but a social practice.
朋友相逢欢聚却不饮酒,连洞口的桃花也会笑话。