“Until you try, you don't know what you can't do.”
“You don't know what you can get away with until you try.”
“You can't know what you may achieve until you set aside fear of failure and give it a try.”
“You don’t know what you can do. You won’t know until you try.”
“Sometimes you don't even know what you want until you find out you can't have it.”
“You never know just what you can do until you try.”