By here,I just think of an affair of my teacher.Yesteday,while he was teaching real analysis in the class,he break out for a little moment and said:

People always said music and math are elegant things.But I think,math is more elegant.For example if you meet some friends and then you talk,you say,I sing two songs this morning and I'm happy.It is good but not so romantic.But if you say I proved two conjecture these days and I'm very happy,then it sounds fantastic.(Students laughs)

After that,he added:So it seems the most elegant thing is doing math while you are singing a song.(the whole room burst into laughter,haha)