Brian Acton was rejected by Facebook in 2009, he founded whatSapp that same year and sold it to Facebook for $19 billion in 2014

Brian Acton was rejected by Facebook in 2009 and later that same year, he co-founded an application called WhatSapp. In 2014 Facebook bought whatSapp from Brian Acton for $19 billion dollars.
See and read what Brian Acton tweeted on twitter when he was  rejected and blocked by Facebook in 2009.

Never let rejection in life put you down. Keep pushing hard, you will get there someday. Sometimes, every disappointment in life might turn a blessing. Blessing cannot come if you gave up. You mustn't give up to disappointment and rejection. Work hard and pray hard, if you believe in God. But God will also tell you that the first thing you need to  do is to work and never give up.

This is powerful, it really motivate me.