Imagine if all teachers were even 10% as invested in their students as Mr. Kumar - "He coached them for free and paid for their lodging. His mother cooked all their meals. For months, he stoically toiled with their books till 2am every night. On the big day, he dropped them at their test centre, and waited."
Also, this next quote applies to pretty much everyone. The second someone has the confidence that they can do anything and feel empowered, they will do amazing things, which is exactly what you pointed out, Squirrelman.
“Basically, all poor lack confidence even if they have the brains,” Mr Kumar said. “You instil confidence in them, and the world is their oyster.”