Doing the same things you've always done, over and over, is like sticking your head in the sand. The ostrich believes she is hidden from view with her foolish head stuck in the ground. It's a known fact that Cupid aims for the heart. It's hard to hit your heart when your rear is waving in the wind. The ostrich hides her head in the sand because she is afraid.
Action is the only cure for fear.
Yet, you can paralyze yourself thinking of worse-case scenarios. I know a few people who jump off the bridge before learning to swim. Other people practice and practice. They swim for years so they can be perfect before even looking at the bridge. They rarely get perfect so swimming doesn't help them.