The toddler must say no in order to find out who she is. The adolescent says no to assert who she is not.

The toddler must say no in order to find out who she is. The adolescent says no to assert who she is not.

蹒跚学步的孩子必须说“不”才能知道她是谁。青少年说“不”是为了表明她不是谁。

-- Louise J. Kaplan 路易丝·J·卡普兰