It is in the thirties that we want friends. In the forties we know they won't save us any more than love did.

In chemistry, as in life, the most transformative reactions often occur at the boundaries between disciplines.

你连自己都管不好，怎么能治理国家的正事呢？ 

许多人的名声如果在街上遇到自己的品德会互相不认识。