stop being afraid

in so many places, movies or magazines, we have heard that fear is no neccesary in our lifes… so why we usually feel it?? Is just a change of mind…
There was a day that I read next phrase:
“Do things without mind what will happen… and anyhow, what is the worst thing that might happen to you?”
When i read this… I thought for myself… of corse! Nothing worst could me happen!!!
From this day I try to use this feeling when I see me paralyzed for fear.