The divergent series are the invention of the devil, and it is a shame to base any proof upon them.
            
            
        
        
    发散级数是魔鬼的发明,基于它们的任何证明都是一种耻辱。
        领导力是关于以信念和同理心做出艰难的决定。
                    True happiness comes from within, not from external achievements or possessions.