Ruben Firnenburg (22) is 6 times german national champion in  sportclimbing, 

bronze medallist at the world univesity games,

bronze medallist at the junior world champs in china 2016 and 

second youngest German - after his brother David - to climb 9a (extreme difficulty) with 16 years

on top of that, he fought cancer and successfully beat it. 

What is the mindset that helps you fight through a life crisis?