It's entirely possible that my outlook could change in a half an hour or tomorrow or in three years. I might reach a point where it makes sense to me and also feels right, but there's no way I can know that now.
Real change can be hard to come by, and it's tempting to want to start lowering expectations, or throw in the towel on your goal completely. But don't despair, because it's not too late to push the reset button and try tackling those goals again.
To be successful, you need to understand the very vital difference between believing you will succeed, and believing you will succeed easily. It's the difference between being a realistic optimist and an unrealistic optimist.