I'd rather attempt to do something great and fail than to attempt to do nothing and succeed.

I had rather attempt something great and fail, than to attempt nothing at all and succeed

What great thing would you attempt if you knew you could not fail?

What would you attempt to do if you knew you would not fail?

Better to do something imperfectly than to do nothing perfectly.

Most people who succeed in the face of seemingly impossible conditions are people who simply don't know how to quit.