改变行为的唯一方法是通过操纵强化偶然性。
The only way to change behavior is through manipulation of reinforcement contingencies.
My life I never held but as a pawn to wage against your enemies.
A good picture book should be a collaboration between words and images, where each enhances the other.
实现明天理想的唯一障碍是今天的疑虑。
爱是你与万物之间的桥梁。