Knowledge Poem by Sankhajit Bhattacharjee

A primary school teacher
'I teach all subjects'.

A secondary school teacher
'I teach science group'.

A higher secondary school teacher
'I teach Mathematics'.

A college professor
'I teach Calculus'.

An university professor
'I teach Integral Calculus'.

A scientist
'I am trying to solve this problem since three months'.

As you go higher
the length and breadth of your knowledge decrease
but its depth increases.