At Oxford University 

*Dr. S RADHA KRISHNAN*

While speaking.. 

One of his students raised a question.

"Sir, Whats the difference between a *Station Master* & a *School Master?"* 

All were very eagerly waiting for his answer, because they thought it is an irrelevant question to him, but

 

He coolly replied....

"The Station Master, *"Minds the Train"* &  a School Master *"Trains the Mind"*