One such Sunday he told me about this 2+2=4 rule .
It is quite simple , when we were young and tender in primary / junior classes , teachers used to teach us 2+2=4 and if we went wrong , she would first try to make us understand , if we still could not learn then she would give it another try , if we still didn't ,she would cane us real hard , if we still did not learn she would even punish us with 25 sit-ups or talk to our parents or whatever but she would stop only when we learnt that 2+2=4.
Just like that in our lives each time we face a problem , not only do we have to overcome the problem but learn from those mistakes , if we don't , life will come up with a little more harsh way of teaching us the same rule / quality / whatever that we lack ... but just like the teacher it would never give up on us until and unless we learn from our mistake !
Simple right ? So next time you have some valleys in your life make sure to be strong enough to overcome it and yeah , learn from it too ! :) !