What appears good to one may appear evil to another, and vice versa.
解释:屋顶是否有漏洞,下面的人才知道。
真正的老师会保护学生免受他个人影响。他激发自信。他将他们的目光从自己引导到激励他的精神。他不会拥有门徒。
No matter how complex or refined, all behavior is to be explained in terms of stimulus and response.