意识服务于有机体有效与世界互动的需求。
在气候多变的时代,适应是生存的关键。
To be happy is only to have freed one's soul from the unrest of unhappiness.
The world is changed by your example, not by your opinion.
因果关系的阶梯有三个梯级:观察、行动和想象。