Change happens when the pain of staying the same is greater than the pain of change.
This applies to so many aspects of life. The fear of the unknown should not hold us back from evolving. A time will come when staying the same becomes unfeasible and then the fear of change becomes insignificant. Yes there is the chance of failure, but why ignore the possibility of success?
What if I fall? Oh but my darling but what if you fly?
What are you most afraid of?