The only valid data for psychology are the reports of trained observers.

No society can surely be flourishing and happy， of which the far greater part of the members are poor and miserable.

Memory is a tricky thing; it can be both a comfort and a curse.

解释：药材的使用方法有做成丸剂的，有做成散剂的，有水煮的，有用酒浸泡的，说明了药材使用的多样性。