"Books are the keys to imagination, and imagination is the key to the future."
處于逆境，思想要開拓放達，奮發(fā)圖強；處于順境，思想要警覺收斂，約束自身。
市場競爭能夠促進資源的有效配置。
Reinforcement is the central factor in the acquisition of new behavior patterns.