here’s a link to one of my favorite this american life episodes. it’s about a blind gentleman who learns how to ride a bike. the takeaway is that there is power in believing in someone. you increase the likelihood that your friend will accomplish a task by simply believing in them.
this goes the same in reverse. if your friends believe in you, you are more likely to accomplish your task. belief is an energy, and is contagious. it creates motivation and community. it feels good.
of course, blind faith or false beliefs are destructive. we must always ground our beliefs in evidence and subject our faith to scrutiny. however, sometimes this means that our faith is strengthened in our friends, and ourselves.